Fix Suction Cups That Wont Stick

How to Fix Suction Cups That Wont Stick

Suction cups are used to keep things in place on flat, smooth surfaces. It’s a simple alternative to glue, magnets, and other holding materials. Suction cups attach to a slick surface better than glue or magnets. Suction cups, unlike glues, can stay in place even after they’ve been removed from the surface.

When it comes to arranging in small places, suction cups are the best-hidden secret. It only takes a few seconds to put them up, and once they’re up, you’ll be able to make the most of your wall space.

However, there is one caveat: they don’t always stay. While suction cups can provide you with more storage alternatives, they aren’t worth the effort if they constantly fall. If you’re tired of losing suction cup battles, we can help you win with some simple suggestions.

Ways to make the suction cups stick more

The following are some ways that you can use to ensure that the suction cups that won’t stick are well fixed.

Make Certain You’re Using the Correct Surface

Suction cups don’t operate well on all surfaces. Begin with a clean, perfectly smooth surface that is neither rough nor textured. Even a smidgeon of texture can make or break a sale. You’re setting yourself up for disappointment if you expect a suction cup to attach to a rough plaster wall. It won’t be able to create a vacuum strong enough to keep the air out.

Clean everything thoroughly

This simple approach may help you solve your problem. Take your cleaning to the next level if it still doesn’t have the suction you think it should. Wipe clean the wall and the suction cup with white vinegar or rubbing alcohol. That will eliminate any greasy or slimy coating that you can’t see, but it may affect the suction.

If you’re planning to hang the cup in the shower, vinegar will suffice; but, if you’re working on a painted wall, you should test the vinegar in a small area first to ensure that it won’t damage the paint.

Make Use of Some Water

A small amount of water can greatly improve the grip of a suction cup. First, rinse the entire cup with warm water to soften it. Next, shake the water out of the cup quickly, then hang it on the wall. That is frequently effective.

Keep an eye on the temperature

If you’re attaching a GPS unit or whatever else to your car window with a suction cup, don’t do it in the cold, making the cup less flexible. In warmer weather, you won’t be able to get a good latch. Instead, allow for a minimum temperature of 40 degrees Fahrenheit. If you have to put it up in the winter, set defrost to the highest setting to keep your window warm. Also, keep the suction cup heated until you’re ready to use it.

Be honest with yourself

Suction cups are not supposed to be used to hang anything breakable. It may also fail to hold something extremely heavy if you try to use it for that purpose. Instead, use 3M Command strips or a comparable easy-to-apply strip for heavy things, or stick with nails, screws, or anchors.

Fix Suction Cups That Wont Stick

How to Make a Suction Cup Stick

Suction cups work well on non-porous, smooth surfaces like tile, glass, fiberglass, or metal. Before attaching the suction cup, make sure the surfaces are completely clean and free of soap film. To get the best results, follow these steps:

  1.     Use a home cleaner to scrub the surface, then rinse and dry thoroughly.
  2.     Use rubbing alcohol to clean the surface and thoroughly dry it.
  3.     Rinse the suction cup’s interior with warm water and shake off any excess water.
  4.     Ensure no air bubbles between the suction cup and the mounting surface by pressing it firmly in place. Before installation, you may need to attach the suction cup to the shelf or hook you’re using, depending on the application.
  5.     Allow 24 hours for the suction cup to settle before attaching any load.

Frequently asked questions

What causes suction cups to fail?

In essence, the suction cup’s seal is recognized to be a weak link because air can gradually leak into the cup’s interior. To keep the mount in place, the suction cup generates ambient atmospheric pressure (14.7 psi). When the air pressure holding your suction cup in place is lost, the friction force that holds it against the glass and stops it from sliding or going down is also lost.

The surface treatments and materials used will determine the rate at which air leaks will be determined. Glass surfaces and any other smooth surface are the most effective combination.

What is the maximum weight that a suction cup can hold?

 It is highly dependent on the suction cup’s vacuum level and suction area. The force exerted by a suction cup is calculated as F=dP * area of the suction surface, where dP is the known pressure difference between ambient and lowered pressure inside the cup. The area refers to the circular area at the cup’s aperture, which means that a cup with a large enough size can exert more force and hold heavier things against gravity.

Why does soaking a suction cup improve its adhesion?

If we suppose that the suction cup and the surface aren’t smooth, clean, or flat, we can conclude that their intermolecular bond isn’t ideal too. It is due to flaws that aren’t visible to the naked eye. Wetting a suction cup makes it stick better because the water fills in the flaws, allowing the little vacuum created by the suction cup’s elastic qualities to be sustained for longer.


Suction cups, in theory, are a terrific way to bind objects to each other when glue, fasteners, and magnets aren’t available. Unfortunately, when it comes to keeping one thing linked to another, many suction cups fail miserably. Suction-cup success is ensured with a little pre-suction cleaning and a few droplets of water.

Rather than discarding the goods, suction cups are repaired. A few products are used to restore the suction cup to its original state. Suction cups can be repaired using the procedure outlined above. It’s simple to use both in the store and at home.

Leave a Comment

Your email address will not be published.