A friend of mine recently dealt with this issue. His ETC device was crookedly stuck in the corner of the windshield, and he thought it was no big deal and endured it. As a result, for several consecutive days when driving through toll stations, the device didn't respond, wasting time and affecting his mood. In the end, we went together to the ETC service point for consultation. The staff directly helped reposition it properly, and the process was quick. They also reminded that incorrect placement could lead to weak signals or repeated deduction errors. For daily use, I recommend ensuring the windshield is clean and scratch-free before installation, and after sticking it, don't rush to use it—wait for the adhesive to cure. The position must be in the central unobstructed area at the top of the front windshield. If it's already stuck incorrectly, don't tear it off forcefully to avoid damaging the internal chip of the ETC. Instead, you can use a thin string to slowly saw through the adhesive layer to remove it. Also, choose a cool day for the operation to avoid issues with the adhesive softening due to heat. This is quite common, and many car enthusiasts have shared similar experiences. Remember to regularly check the stickiness to prevent detachment. After handling it, test the device's functionality to ensure it's working properly, and then you can rest assured.
