We use the best suction cups on the market, but in case your bathroom tiles are rough and the surface is not flat, you need to use adhesive hooks.
Suction cups should work fine if you follow these steps:
1. Clean the surface from any dirt or other residues.
2. Pres the suction cup to the wall holding on to the hook itself. The hook should face forward (90 degrees to the wall) with the hook opening facing up.
3. Turn the hook down and it should suck itself strong to the wall.
If the hook does not stay for long, you can try to moisturize the suction cup slightly before application.
If a wall is not smooth and suction cups do not work, you should use adhesive hooks that are included in the package. They are not permanent and easy to remove by heating the glue with hot water or a hair dryer.