Bathroom suction cup hook is old, what is the way to suck it tightly

Before installing the hook, wet the working surface with water, and then stick the hook upward, so that under the action of water, the hook will stick tightly to the wall, as long as it does not hang heavy things, it can last for a long time. But it will still fall after a long time.

Before suctioning, squeeze a little sealant (transparent) in the middle of the suction cup. The next day. Never fall. If you need to remove it, you can use a blade to get it down.

I used AB glue to apply to the suction cups. It's good, and it can be picked off when you don't use it later, so it doesn't affect the surface of the tile.

Koester magic suction cup, using the principle of vacuum, can be firmly sucked on the wall, suitable for wood, patterned tiles, glass and other non-breathable surfaces, and no nailing, no drilling, no lock screws, as long as a light press, can be sucked, bearing capacity of 5 kg, and can be reused.

See what your suction cup looks like. My home "Taikang Home" hook is covered with a layer of membrane. When pasting, it should be clean, and there should be no water, oil, or dust. Hung really firmly. I can't pull it off. You can go to Taobao and search for "Taikang Home".