Image quality is much depending on light conditions. My camera is worse when there is a lot of green (trees, grass). However, your night shots are bad quality. You definitely took off the protective foil of lenses?
The black part of the glass is a baked ceramic coating. In my opinion, sticking and possible peeling of the camera did not damage the coating. I have never seen this black (dotted) part of the glass damaged, peeled.
Bloutetooth Button is used to save the video file (record length is the same as recorded files - 1- max.10 min. - according to the settings in the camera) to the "RO" folder and
Creates a photo at the moment of pressing.
It's strange. Originally I had an SD card from Samsung SDXC 128GB with which I had constant problems. Then I bought an SD card VIOFO
128GB MLC UHS-3. I have for the third year (I don't even format the card) and the card works without the smallest problem. So I can recommend cards from Viofo.
Does it make every time? In my case it happens that sometimes the camera does not turn off after turning off the ignition. And vice versa, sometimes it does not turn on after starting. It is often not often, but it happens. I don't know where to look for a problem.
I had a similar experience with FW 2.1. The camera did not turn off after turning off the engine, respectively after pulling the ignition key. I use FW 1.8 and the camera turns off. I do not use the parking mode.