I recently, (APRIL 2020) had a Blackvue DR900S-2CH Dash Camera installed in my car. Everything about this device is quite good except it would fail to reliably connect to the WiFi. I quickly found the solution. I use an Android LGV30 phone. I went into the cell phone settings and chose Network & Internet portion settings. All I had to do was to turn Mobile Date Off.
I discovered that my Pentax camera felt really sticky to touch. I tried dish soap but that did not work at all. I finally tried Sprayway Glass Cleaner and that did work. I had to shoot the camera about three times and wipe it down with a towel and I had to rub certain parts more than others.