How to make suction cups stick?
In order to get suction cups to stick I have always licked them. I know it sounds odd but just wetting them didn’t work so I lick them or lick my finger and wet them and they stick. Other people use baby oil and say that works but don’t use too much. Also after you get it to stick let it sit for a little while before moving it or hanging something heavy on it. After you lick it you might want to tug the middle a little to make sure it is firm.
