Our cable clips are armed with 3M Adhesive Backing and really do stick to what you put them on.
They can be so efficient in their sticking that it's hard to get them off. There is a simple trick to getting them off!
All you have to do is go into your bathroom, grab the hair dryer:
Using your hair dryer, turn it on and aim it at the cable clips for about 10 seconds. This heat loosens the adhesive and will allow you to pull it off of the surface easily.
If you're still having problems, heat them up for as long as it is necessary for the adhesive to loosen.