Re: How in heck do you stick anything to the dash?!
Several years ago I had one of those suction cup note pad gizmos so I could jot notes while driving. However, after the purchase of a different car it would no longer work with the angle of the new windshield and angle of the dash.
I used silicone seal, the kind you find in the home improvement stores, to smear a small dab on the suction cup and applied the suction cup to the dash. This lasted for over two years until I traded it on another new car.
It removed very easily and cleaned up with rubbing alcohol, leaving no tell tale signs that it had ever been there.