The Foolproof Tip to Make Suction Cups Never Fall Out
Suction cups are great for hanging up a whole lot of things without making holes. The recurring problem is that they come off too often. Suddenly, we waste a lot of time picking them up and putting them back together.
But don't worry, there is a simple trick so that all of your suction cups never fall out. You only need salt water .
How does a suction cup work?
A suction cup uses atmospheric pressure to cling to its support. The air under the suction cup is released under the effect of the pressure. The suction cup clings as long as the ambient atmospheric pressure is different from that between it and its support.