I've tried replacement velcro, replacement stickers, replacement double sided tape. I just used 2 monster black ezpass sized (not kidding) velcro things and plop, it keeps falling and hitting the dash. It seems like the glue melts no matter what I use. That and the angle of the windshield makes it seem impossible to keep it behind the rear view mirror. I am NOT going to stick some velcro tape to the dash, if you are thinking of that as a solution.