I have one of those car phone mounts that stick to dash or window. It kept falling or unsticking over and over. I sprayed the bottom of the plastic parts with glue. It’s like a spray paint can of glue. That fucked has fallen off in years.

I had one that stuck so well that my mom broke hers off when yanking on it, she just clumsy. Goo begone just takes it right off as needed.