Why does the ETC keep falling off?

[ODallas]

It is possible that the owner's car has been parked in a place exposed to sunlight for a long time, causing the adhesive tape to lose its stickiness, resulting in the ETC device falling off. Here are some precautions for installing ETC: 1. Installation height: Pay attention to the installation height, which should not be lower than 1.2 meters or higher than 2.5 meters. 2. Installation angle: The installation angle N should be between 30° and 90°, which is the angle between the surface of the electronic tag and the horizontal plane. 3. Avoid obstruction: When installing, avoid the black areas on the windshield and do not install it in a position that blocks the solar battery. 4. Do not remove it casually after installation: Do not remove it casually after installation to avoid the ETC becoming invalid after removal.

[McRafael]

As someone who frequently modifies car audio systems, I often encounter issues with ETC devices not sticking properly and falling off, mainly due to adhesive quality and installation techniques. The windshield surface may have oil, dust, or dirt, which prevents the adhesive from bonding firmly when applied directly. Additionally, the adhesive itself may age or be too thin, causing it to loosen with temperature fluctuations from cold to heat. I remember last time when I replaced the device, I had to thoroughly clean the glass with alcohol, then peel off the protective film and press firmly for over 30 seconds to ensure the adhesive bonded properly. In summer, high temperatures can soften the adhesive, causing it to slide, while in winter, cold contraction can make it brittle and prone to falling off. I recommend choosing new adhesive patches with strong backing or regularly checking the device. Keep some specialized cleaning cloths and small tools in the car so you can quickly reinstall it if it falls off, avoiding trouble on the highway.

[HazelRose]

Having driven for decades at my age, the frequent falling off of ETC devices is indeed annoying, usually caused by loose adhesive patches or uncleaned surfaces. If there are fingerprints or grease stains on the windshield, the adhesive won’t hold well; aging adhesive also doesn’t last long. The solution is simple: first, use a clean towel dipped in alcohol to wipe the glass until it’s smooth and clean. After wiping, don’t rush—wait a few minutes for it to dry completely before applying. When attaching, press down steadily without shaking, and hold firmly for half a minute to ensure the adhesive bonds securely. To prolong the adhesive’s lifespan, avoid parking in direct sunlight or extreme weather. Regularly washing your car and taking a quick glance to check can easily prevent it from falling off and disrupting your trip.

[AddysonLee]

For ordinary office workers commuting daily, an ETC device falling off can really waste time. The root cause is usually dirty glass causing the adhesive to fail during installation, or the adhesive aging and losing its grip. The fix is quite quick: clean the glass with an alcohol wipe to make it shine, peel off the sticker and press it firmly back on; replacing it with a new adhesive film works even better. Temperature changes have a big impact—the adhesive softens and loosens easily in summer, while it becomes brittle and falls off in winter. Keep some strong double-sided tape on hand for emergencies, and you can fix it quickly without affecting your trip.