[quote]I lucked out the other day and found a 16 piece set of "Amazing Instahooks" in a thrift store. Never been opened. These are pretty cool. You press it to the wall and flip the hook from top to bottom and this draws the suction cup out from the wall creating the suction pressure and snapping the hook down. They work GREAT. Two different sizes in the package I got for like 2 bucks!
When the temp fluctuates they will drop off. We have gone over to the 3M sticky tape hooks. So far so good.
They have held up my shower radio on ceramic tile at home for over a year now.
We still use the suction ones when we camp but have to clean them off and re suck them once in a while.