Other elements, I imagine, will play a role. Obviously, whether or not your dash cam displays your current speed, as well as whether or not it allows you to turn it off and on, will be important.
So obviously this discussion isn't for you if you don't have a dash cam, have one but don't have this feature, or have one but can't turn it off:beer:
So, for those of you who DO have a dash cam and have the ability to switch on/off the feature that displays your speed on your recordings.
I can see why you'd leave it on if you're someone who won't travel a single mile over the speed limit under any conditions.
Personally, I have periods when I drive quickly and times when I do not.
If I'm driving on back roads, for example, I'll take it easy.
I'll approach corners with caution because I don't want to be flying where I can't see, and there are so many jerks on back roads who drive at 100 mph on the wrong side of the road.
If I'm on the straights or on a quiet open road, I'll drive quickly. On the way to work, there's a long, straight stretch, and it's a 50.
When I travel in the morning, it's basically vacant, so I'll go 60-70 on there, but when I return home and it's evening traffic, I'll do the limit because the conditions demand it.
As a result, I've decided to leave things alone for the time being.
The dash-cam reporting mechanism is aimed to detect offenses such as reckless and risky driving, near passes on pedal cyclists (and motorcycles), as well as other violations such as running red lights or using a cellphone while driving. It is not designed to catch speeding offenses.
There are many ways to calculate speed, the most obvious being time and distance, and camera frames per second can be used to calculate a vehicle's speed.
The police, on the other hand, are unlikely to go to great efforts to determine the approximate speed of anything unless the speed is so blatantly high that it constitutes reckless driving, in which case they will.
It only takes one dedicated cop to start the ball rolling, and if the footage comes from an area that receives a lot of complaints from the public, it's bound to get noticed.
Consider a car or bike show where the local community is constantly complaining about cars' or riders' actions, and suddenly a video arrives, verifying all of the concerns.
Even if no action is taken in response to the video, the police are likely to take action on their own - they may begin actively monitoring the area with the goal of enforcing speed limits.
The National Dash Cam Safety Portal is the simplest way to send police original footage from someone's dash cam footage for prosecution to prosecute footage from drivers.
It is permissible to use them for private purposes in France; however, film should not be shared to the internet and should be reported to the police immediately in the event of an accident. Europe has the most diverse relationship with dash cams of any region on the planet. Despite the fact that Europe accounts for over half of the global market for automobile dash cameras, numerous countries in the region have outright banned the devices.
They should also not obstruct the driver's field of vision, as is the case in the United Kingdom.
Thinkware's dash cams, with the exception of one, do not have a screen, allowing them to be positioned behind the rear-view mirror without distracting the driver.
In France, dash cameras have been slow to catch on, with only 35,000 units anticipated to be in use as of February 2020.
Some insurance firms are beginning to provide discounts, with L'olivier, a French online subsidiary of UK Admiral Group, giving a 10% discount and Acomme Assure, another online firm, offering a 15% discount.
When paired with an internal or external GPS antenna, all Thinkware dash cams provide safety camera warnings.
It is now unlawful in France to specify the site of enforcement cameras; however, it is permissible to advise of danger zones where cameras are installed.
Many European countries either prohibit or severely restrict the usage of dash cams?
In other circumstances, British citizens who use dash cams while traveling abroad face hefty fines or even jail time if they break the law.
The requirements for using dash cams differ greatly across the continent, so it's crucial to familiarize yourself with them before visiting each country.
Some European countries, including as Spain, Italy, Malta, and the Netherlands, have no limits on the usage of dash cams.
However, in some countries, such as France and Belgium, dash cams are only allowed for "private usage."
Dash cam use is also prohibited in a few nations, including Austria and Portugal.
In Austria, repeat offenders face astronomical five-figure fines.
We all assume we're fantastic drivers and that nothing bad will happen to us, but accidents do happen, and a dash cam can save you a lot of trouble by acting as your personal expert witness when all other witnesses have fled.
If there is any uncertainty about an occurrence, you may be facing a lengthy court case, which can cause tension and fury, all of which can be avoided with the use of a dash cam.
Insurance companies will examine the film, and if it's obvious enough as to what transpired, no legal actions will be required.
Someone who has recently been in an accident is the easiest person to sell a dash cam to, as their personal experience highlights the need.
Can you afford to take the chance at costs as low as €100?
Now you know how have your privacy respected in France when planning your vacation throughout Europe.
All you need to know about dash cams and the legislation in the United Kingdom. Dash cams are unlike any other piece of technology in that they can have real-world legal and financial ramifications. To stay safe, make sure you're using your dash cam appropriately and adhering to National Dash Cam safety.
We don't want overburdened police departments to be burdened with thousands of entries for "dangerous driving" or "speeding" when a biker has done nothing wrong.
Dash cam manufacturers are therefore already keeping a close eye on technical improvements and privacy laws due to their rising popularity on UK roads and being used as evidence. Dual dual dash cams are currently available with the ability to record both the front and rear of your vehicle 24 hours a day, seven days a week.
If a case is contested and the police want to use incriminating dash cam footage as part of their prosecution case (to prove road users reckless driving or a road rage attack type road traffic offences), there are still certain practical hurdles to cross before it can be used in a courtroom.
It doesn't have to be a multi-vehicle collision or a hit-and-run to be reported; even risky driving or excessive speeding can be reported. What you can do with your incriminating dash cam footage, when you can use it, and how to make sure your dash cam is lawful. Dash cams are in the press, insurers mention them in their terms and conditions, and they're even being used in UK court cases. But, in the perspective of the law, where do dash cams stand?
With more police departments supporting the use of dash cams, there appears to be no debate about their ability to provide strong evidence.
Two Constabularies in the UK are promoting the submission of dash cam evidence and their most recent efforts appear to be well received by motorists seeking to defend their legal rights while driving.
One of its spokespeople recently stated on behalf of the West Midlands Police road traffic section, "West Midlands Police is intending to establish a new form of 'self-reporting' due care and attention-type road traffic offenses."
The obvious benefit is that it can prove the cause of an accident and liability in the event of a collision. However, this could benefit both camera users and non-camera users."
As a result, the driver isn't the only one who profits.
Unfortunately, it appears that the current answer is 'yes.'
If a case is contested and the police want to use effective dash cam evidence as part of their prosecution case (for example, to prove reckless driving), there are still certain practical hurdles to cross before it can be used in a courtroom.
The reason for this is that the individual who recorded and uploaded the video may be required to make a statement and eventually testify as a prosecution witness in court. This is where issues occur quickly.
While many motorists are glad to submit their dash cam footage, they do not want to appear in front of the Defendant in Court - especially when the Defendant could lose his or her driver's license or perhaps they could face jail sentences if they testify.
Add in the overall experience of attending Court (which many witnesses find daunting in and of itself), taking time off work, and potentially aggravating a Defendant...
It's easy to see why some witnesses refuse to participate in the entire prosecution process.
There are a few reasons why you would want to question dash cam evidence.
Timing would be the most difficult obstacle to overcome.
A Notice of Intended Prosecution (NIP) must be issued by the police within 14 days of the offense being committed. As a result, they ask that submissions be filed within 10 days of the offense, and they then rely on their processes to assess the film and issue an NIP within the remaining four days. If you do receive an NIP, double-check the dates.
The location of the dash cam in the car that was used to film the evidence is another area where you might contest the legitimacy of the evidence presented against you.
If the position of the dash cam in relation to the driver's perspective can be determined, and it was installed in a dangerous manner, the driver can be fined, rendering the footage recorded on the camera inadmissible in court.
To decrease the likelihood of a legal challenge, several forces impose rigorous guidelines on the film.
Surrey Police, for example, requires that:
'High-quality footage should contain at least 2 minutes before and after any incident.'
In no manner should a video be modified.'
They also don't want the dash cam footage to be shared in any kind of media, including social media, for fear of jeopardizing the case.
You may be able to question the evidence if you believe any of these conditions have not been completed.
With so many advantages to having a dash cam installed in your vehicle, it's no surprise that dash cam ownership has risen from 1% to 15% in less than four years.
*In several nations, dash cams and/or the video footage recorded with one are prohibited.
An accelerometer known as a G-Sensor registers readings based on the amount of force delivered during an impact. When a pre-determined value is achieved, the recorded film is safeguarded and relocated to a folder where it cannot be overwritten by any new footage you capture. During installation, your Dash Cam's firmware sets these parameters.
The advantage of having a built-in G-Sensor is that if the vehicle is engaged in an accident, the file is automatically secured, guaranteeing that the image is not overwritten by the Dash Cam's usual auto-delete feature. Any of the current dash cam range, including rear camera modules purchased from select shops, can be hardwired in by a trained expert.
When the G-Sensor is active, the padlock appears in the center of the screen, signifying to the driver that the file is being locked. This can give the driver added peace of mind, knowing that their vital footage is safely preserved and can be watched later, rather than having to remove the Dash Cam right after an incident.
Other variables that can activate the G-Sensor include potholes in the road, rapid acceleration and braking, and speed bumps. This can be handy for saving other essential video, however if too many files are being automatically secured by the G-Sensor, the value can be modified depending on the driving conditions or vehicle being driven.
G-shock enabled automotive video cameras and dash cams, capture every motion you make while the g-sensor instantly records the clip when an incident occurs.
Because of its multiple advantages, the car cam, also known as a dashboard camera, has grown in popularity in recent years. Simply explained, this is a camera that is fixed on your car's dashboard and is used to record sounds and images while you are driving. The secret of its popularity could lie in its dual use as a home video security camera.
The dash cam's objective is to meticulously record every detail that occurs both on and off the road, and it can be used for a variety of purposes. So why not use its cheap security function as a video security cam?
Car cams were never designed to run 24/7 so how long can you run one for in the home as a security cam? Will it run for a week while you are on holiday or away on business? What power source should you use? As car cams typically run off engine power, the first thing you would need to think about, if you want to utilise it for long usage, is consider a constant power source as battery Life will not suffice. Would it overheat from being on for a week? Or would it be better used as security at night.
So, your flights are booked and you are wondering if you can bring the car cam in from out in the cold and use it for surveillance. Where do you mount your car security cam? How do you power it? Your SD card needs to be big enough if you are going away for more than a weekend and the power supply needs to be close to where you are mounting it. A phone charger can be used as the power supply.
Car cams primary use is for providing safety when driving, but many people are unaware that they can also be useful when you have parked your car. When you leave your vehicle alone, some car cams have the ability to operate as car security cameras, providing you with film in the event that it is broken into, vandalized, or stolen.These automobile security cameras don't just roll while you're standing still; they also work as your personal record keeper, recording everything that happens on the road while you're going.
However, not all dash cams operate as automobile security cameras, and finding the right dash cam to match your home needs will take some investigation. Many dash cams start filming when the car moves, but just a few stay recording after you park it and leave the area. So the switch to a home static camera shouldn't be too much of a problem if you have one of these dash cams.
To provide continual recording in the home, you will need to reduce the video quality. It's really hard to find a good dash cam with high video quality and large storage capacity. The problem is that if you buy a dash cam with big storage then its going to take a lot of space. If you buy a dash cam that has small storage capacity then you'll end up recording less videos.
So how can you resolve these issues? Well, there are some ways to increase the size of the storage without compromising on the video quality. One way is by using external SD cards. SD cards can be between 32 GB to 2 TB, so be prepared for some extra cost.
If you are looking for a smaller option, then you should consider buying a 32GB or 64GB memory card. This is more than enough space for any dash cam.
Dash cams with SD cards are much cheaper than those with micro SD cards. The difference between them is very minimal. So, if you are looking for a cheap dash cam, then you may want to stick with SD cards.
As I have previously mentioned in this piece, some dash cams work off motion detection when your vehicle is parked, this makes them suitable for home use. This could be a good replacement for those cheap fake security cameras you bought from e-bay.
Motion Detection is a feature that saves videos when there is movement detected. This is useful if you want to keep track of your kids or pets. But it won't help much with storing data because the amount of space used by each frame is pretty small.
If you are looking for a good dash cam that topples fake security cams, I recommend you to check out a review of the X4S. It has a built-in GPS system to automatically detect speed and direction. If you want to catch anything happening, you need to record first. This means that you need to setup a timer to turn on the camera automatically.
I recommend setting up a Raspberry Pi with a web server to serve as a dashboard. It will allow you to access the live stream from anywhere in the world. You can even set up a password protected area so only those who are invited can see the live feed.
If you want to record before anything happens, you can always use a WiFi enabled dash cam. This way you can just turn on the dash cam whenever you feel like it and it will automatically upload the footage to your computer.
But there are some downsides to this approach as well. First off, you would need to pay for the data plan. Secondly, the WiFi connection may not work properly depending on how far away from the router you are.
A standard dash cam with motion detect might enough if you do not require coverage of the entire house/apartment.
Yes they do.
In The UK and also twelve states in the United States, both the driver and the passenger must consent to the audio recording (dual consent). If you were in a car accident and the other party sat in your car to exchange information, you could ask him questions there that he would answer, but not if he was aware of the audio recording in plain sight.
If you notice that you are within audio recording range, notify others immediately. However, if you destroy evidence for the same error, the jury may have a long list of reasons why you deleted that audio recording. Dash Cam records are admissible as evidence in any trial, so if you wipe them, you could end up up with legal issues.
As a result, while audio recording might be beneficial, it can also be harmful. If you utilise an audio recording against someone, you may face counter-suing.
Dash cams are useful tools for defending oneself legally, such as if you're in an accident caused by someone else, or for examining events like a crash in front of you, or if you left your car with a valet who decided it'd be fun to have a joyride on your behalf.
They're meant to record video throughout the duration of your vehicle's operation, and if the memory is full, the most recent clip will usually take the place of the oldest.
This ensures that you always have access to the prior several hours of video to review.
My dash cam can hold roughly five hours of video before it starts destroying earlier clips.
The majority of dash cams now have the ability to record audio in addition to video.
The audio is captured using a microphone incorporated into the dash cam, which is located within the vehicle.
Eavesdropping statutes, on the other hand, control whether you can record a discussion without the approval of some or all of the participants.
Eavesdropping laws are frequently harsh: It is a crime punishable by fines to prison time. Some courts however, have ruled that a person can record a conversation to which they are a party regardless of the other parties to the conversation knowing or giving that party consent in advance.
The conversation between people when a dash cam records conversation combined with the possibility of these being considered illegal recordings and eavesdropping statutes can produce harsh penalties for an eavesdropping offense.
Deleting a dash cam footage is a very serious matter. If you erase your dash cam footage, you could be facing criminal charges. In fact, many states have specific laws regarding this issue. For example, in California, deleting a dash cam footage is considered destruction of evidence.
You should be aware that if the audio is turned on, you may be recording the discussions of your passengers without their knowledge or permission. If many states in the US need all-party consent, this might be considered eavesdropping.
Due to the eavesdropping component of recording audio, if you have video of a valet wrecking your car while taking it for a joyride, the evidence may be considered inadmissible.
Steve Lehto, a Michigan attorney, recently published an article in Road & Track on the subject.
When you are not in your car, the problem emerges. As when you take your supercar in for minor warranty service and leave it in the hands of experts for the day. In many areas, recording a discussion between people in the automobile with whom you are not involved is considered "eavesdropping." Eavesdropping laws can involve severe penalties: In Michigan it is a felony, carrying possible prison time and a steep fine. As an attorney, I advise you to avoid eavesdropping.
However, there are a few of points to be addressed here. The most noticeable is that all of these statutes are concerned with "talk." As in, people are conversing. You'll be alright if the dash cam simply records video and not audio. Is there a mute button on the camera? If that's the case, turn it off when you're not driving.
You might still have some solid defenses if you didn't silence the recording and obtained some juicy footage–including audio–of your automobile being battered. The most evident is that the camera is visible. Did the thugs truly have no idea what the dash cam was recording when they were thrashing your car?
It might not be deemed eavesdropping if the recording was not kept secret.
Whether it is a high spec or budget dash cam, it will almost certainly be placed near the rear view mirror, if that mirror is powered, you're in luck. A power splitter, such as those sold by Dongar, eliminates the need for a cable that is longer than a few inches. Note that by default, these powered mirrors do not provide consistent power. 3M Adhesive Mounts are generally the best way to attach them. Hard-wiring kits are available from most dash cam vendors for around £15.
If the mirror is not powered, here are the full dash cam installations.
A spudger/crevice tool is included by several dash cam vendors for pushing wires into molding and crevices.
We need to know where the fuse box is since we'll be running a power line from the dash cam to it. On the driver's or passenger's side of the dashboard, most automobiles include a fuse box.
The fuse box is located under the steering column in this example (behind the removable panel).
The location of the fuse box in your car can be found in your owner's manual.
It’s best to place the dash cam in the reach of your armrest, but don’t place the dash cam in a location that blocks your view of the road ahead. In this example, customers have chosen to place their dash cam immediately under the rear view mirror.
Install the power wire, starting with the dash cam, about where it will run hidden under the vehicle's interior panel. When heading to the fuse box, this provides you an idea of where to route the cable and how much slack is left.
Vehicle fuses may be powered all of the time (always hot) or only when the vehicle is running (hot at the start). To enable the dash cam to automatically turn on when the car is running and switch off when the driver turns off the vehicle. Use a simple circuit tester that lights up when power is provided to identify which fuses are starting to heat up.You must use a circuit tester to ensure there is no power on the fuse when the ignition is off. The power is only available when the ignition is turned on.
Turn the ignition key to the on position and insert your key. If everything is set up successfully, your dashboard will light up and begin recording! You can now continue by reinstalling all of the removed interior panels to make running the power cable easier.
If you’ve ever used a portable recording device, whether it’s a cell phone, a digital camera, or whatever, then you might see what happens when the storage media is filled. Parking mode will not help this storage problem, so turn it off when it's up the drive or parked up in a garage.
The biggest benefit of installing a mirror mounted dashboard cam is the fact that it does not obstruct the drivers' vision. Dash Cams mounted on mirrors sit neatly out of sight, allowing the driver and the dash cam display to keep their eyes on the road ahead. The added bonus of being able to see what the back seat passengers are doing is another great feature.
Dash Cams with mirrors are meant to be simply fitted to your windscreen to provide a clear view of the road ahead. It's critical to properly install your mirror dash cam on your windscreen so that it doesn't obscure your view of the road ahead or impair your vision while driving.
The car dashboard camera's position and direction are critical. Incorrect positioning can be extremely harmful and also illegal. Depending on where you live, the law for installing a dash cam will be different. However, there are a few things to consider before installing a dash cam.
It's critical not to restrict the driver's vision while installing a dash camera. Installing a car camera behind the rear view mirror is the best option for most individuals. It's also worth noting that certain dash cams are built to work with the rear view mirror. For simple installation and unhindered vision. There are many varieties of dash cam mounts & tapes to help installation but 3M tape is best.
Just search Dash Cam Roundup on any good search engine for series of dash cams, hidden cable tricks, dash cam reviews, suction mount designs, dash cams discreet, auxiliary cables, lighter port cables, mini USB power cables and all sticky mounts.
Yes, because it will help you to reduce the cost of your car insurance premium.
No, because if you are involved in an accident while using your dash camera, then your insurance company may not cover the damages caused by your own negligence. They record everything that happens, so any false charges may be disproved using dash cam film. Dash cams are welcomed by insurance firms since they reduce the incidence of fraud, resulting in cheaper insurance costs.
Having a dash cam lowers your insurance rate for two reasons:
1) It can be used as evidence in court should you get into a collision with another vehicle or pedestrian.
2) If you have a good driving record, then your insurance company may give you a discount on your premiums.
A dash cam can also be used to prove that you were not at fault in any traffic accident that occurred during your trip abroad and so will not affect your travel insurance premiums
Because dash cam footage is more dependable, most insurers are glad to use it to support insurance for drivers claims. "Traffic accidents happen so quickly and cause so much stress," he says, "that it's quite likely that the persons involved and their recollections will be foggy, even before taking into account that people naturally interpret things to their own advantage." Dash cam footage provides a solution to this problem.
Use an adapter with a built-in bracket and plug your phone into the adapter instead of directly into the car's electrical system. Don't just let the cable drop down loosely on its path to the USB port or the cigarette lighter, no matter where you place it. This could invalidate any insurance you got on your car insurance. Dash cameras do not reduce insurance premiums by themselves, but they can provide evidence that can lead to lower premiums when defending against fraudulent claims.
As dash cameras become more prevalent, insurance firms are realizing that drivers who have one are more likely to be cautious on the road, and dash cam insurance discounts are becoming more common.
Dash cams are quite valuable, however depending on the accident, they may not capture everything that happened. Allow a lawyer to assist you in determining what to exhibit and how to show it so that you can be protected.
Although a dash cam has a greater initial investment cost, it could save you thousands in court costs and insurance rates. Maintaining your no-claims discount with your insurance provider and maintaining a consistent premium in your insurance policy are also excellent reasons to record while driving. A dash cam can help you save a lot of money that would otherwise be lost due to the cost of insurance fraud discovered by the insurance fraud unit.
Unlike the human eye, that can only see a fraction of what is actually there in visible light, Wide Dynamic Range on a dash cam enables a superior image in finer details of what is visible in front and at the back of your vehicle both in the light and in the dark light. In comparison, Dash cams without WDR perform more like the human eyes light levels. If you prefer to trust your senses, there is no need to read on. If however, you have no problem harnessing the latest technology to enhance your drive WDR is designed to be used in applications where there is a large range of light difference in foreground and background, which is useful when viewing license plates at night.
Wide Dynamic Range - WDR is a type of image processing that ensures clear recordings in both bright and dim light. This can obviously be extremely useful for people who want to record everything when there are differing levels of brightness. Dynamic range refers to the contrast in illumination between parts of a picture that are extremely black and parts that are so bright that no details can be seen on license plates at night. Wide dynamic range (WDR) cameras need specific software to balance the lighting for a single, clear image. This makes them perfect for recording situations where the contrast between sunlight outside and dark lighting inside the vehicle might be difficult to capture. The decibel (dB) is a logarithmic measure for enhanced images, expressing the intensity of a ratio of two values. WDR is measured in dB. It measures the differences in ratio of the radiance of the brightest and least-brightest object in the scene.
Because cameras without WDR can only reliably record the intermediate area of light between very dark and very bright, they have issues with underexposed and overexposed photos.
WDR-enhanced cameras have two additional means of balancing light for better photos, in addition to recording a wider spectrum of lighting more precisely. Tone mapping allows the camera or software to brighten and darken dark and light regions automatically. Alternatively, the camera may take many images at various exposure levels.This results in identical overexposed and underexposed images.
WDR enables the Dash Cam to merge many photographs of varying brightness levels into a single improved image, allowing it to record more detail in contrasting light areas and improving the ability to recognize essential elements and forms. This provides added security and visibilty for the driver.
Advanced sensors in dash cams using WDR technology can create a wider range of brightness, allowing them to record in a higher light depth.This approach necessitates a light-sensitive, extremely quick sensor, which is only accessible through WDR. This technology, on the other hand, necessitates an incredibly fast and light-sensitive sensor, which is only found in advanced professional cameras. WDR is only available on professional cameras, therefore it may be out of your price range. The more you pay, the more you see.
Dash Cams now have a better ability to give enhanced photos in the most difficult settings thanks to the addition of WDR. With more and more traffic in developing countries and less infrastructure, WDR could become an important source of recording accidents and incidents for the police and public alike. This technology, on the other hand, necessitates an incredibly fast and light-sensitive sensor, which is only found in advanced professional cameras. Again, it may not fit your budget.
After a small amount of research, I discovered a couple of neat ways to remove a dash cam and 3M adhesive from a windshield that was mounted using 3M tape.
All you will need to get that dash cam mount and 3M adhesive off your windshield, is some dental floss or fish wire to get the job done.
Detach the camera, then insert the floss or fish wire, behind the mount and start sawing from right to left. This sawing action will remove the plastic from the 3M tape stuck to your windshield. When this has been achieved and all you have left is the 3M adhesive stuck to your windshield, you simply need to use the same process to remove all the 3M tape from the windshield.
When you have removed the plastic mount, you will have some 3M adhesive stuck to the back of it. This will come off, with a little bit of effort, simply by rubbing the 3M adhesive off it by using your fingers and rubbing up and down or by using your nails. Using your nails too, will help to get it off quicker.
Well, we have taken care of a do above, but let's address a don't and then show another do to you. Don't try to pry the dash cam from the windshield using brute force or by using a heavy tool. This could take a longtime and you may damage the dash cam or crack the windshield. This is a no no rule. DO NOT TRY THIS METHOD.
If you don't have any dental floss or fish wire, another good method is to use a hair dryer or heat gun. If you do use this method, it will remove the mount and 3M tape cleanly, leaving no tape residue on the windscreen. Using the heat form a hairdryer or heat gun will soften the adhesives grip on the windshield. Point the hairdryer or heat gun at the mount and heat it up. After around 3/4 minutes on the moderate heat setting, you will be able to easily peel the mount and 3M tape from the windshield.
Either method will work for you, but the quickest way is with hairdryer or heat gun. It is also less messy. Obviously you don't want any marks on the Dash cam or mount so my advice is to resist using any other method, if you are sending it back to the manufacturer.
If you choose to use the dental floss or fish wire method, you could also use some Isopropyl alcohol to clean the windshield of any 3M stickiness. Once you have sawed the mount and 3M adhesive off your windshield, dab a cloth with some Isopropyl alcohol and your windshield will be as clean as it was before you mounted your dash cam.
If you are not a dental health enthusiast or a keen fisherman and have no hair to dry, there is one other method I found that will get the job done with a little bit of effort. Do you have a library card or any thin plastic card? All you need to do is carefully slip it under the dash cam mount, easing it under more and more to loosen the grip of the 3M adhesive. After a minute of this action, the dash cam mount will come off and then you simply use the same rubbing action with your fingers, that you used with the dental floss or fish wire method and the 3M adhesive will eventually come off the windscreen. If it is troublesome, maybe use Isopropyl alcohol to help complete the job and give a clean finish.
The best way to overall to get this job done clean, fast and effectively is by using a hairdryer or heat gun. That said though, we don't all use hairdryers or heat guns so I hope the two other safe ways I have found and described for you above, will help you get that extremely sticky 3M adhesive off your windscreen and dash-cam mount. Whose idea was it to get rid of suction pads and a bit of tried and tested science?
Good luck with the method you choose and remember - don't crack anything.
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