Re: How in hell do you stick anything to the dash?!
No problem with Garmin or radar detector suction cups. They stick well and last for weeks. Make sure the window is clean and dampen the suction cup with a little spit (from your finger, not hawking a big lugee on it) helps it adhere. The do make bean bag Garmin stands which you can find online for about $30-40 (google is your friend).