Sucker tips 1， if worn off or becomes hard sucker adsorption， in the hot water about 60 ℃ immersed for about 10 minutes after the dry， you can re-use. 

2， If you find easier to slip sucker， can be coated with a small amount of oil (salad) on the inside of the sucker， sucker is not so easy to slip up. 

3， suitable for surface mounting to the following: smooth surface (tile surface， plastic surface， stainless steel surface， the surface of transparent glass， mirror， metal surface coating， etc.). When installed， then wipe clean the surface first adsorbed on the surface can be pressed sucker. 

(Goods without batteries)