Best to use rubbing alcohol to clean the area since it dries by itself within seconds and leaves no residue behind.BEFORE APPLYING THIS DECAL, PLEASE MAKE SURE THE APPLICATION AREA IS COMPLETELY DRY.DO NOT use anything toilet cleaner to clean the area, which will leave a residue behind or oily substance Easy to apply.Peel and Stick.(No masking tape needed) Come With One Free GlowInDark Switchplated Decal with each order