To remove Joan's Magnetic Mount from your door or wall, use the cleaning solution you would normally use to clean the surface in question, soak the magnet, and remove it with the help of a scraping tool. Get rid of any sticky residue with the help of your cleaning product.
Because the 2 magnets that make up a Magnetic Mount must be kept together, make sure you also replace the magnet located at the back of your device with a new one if moving devices. Otherwise, you risk Joan ending up on the floor.
Should you find yourself needing additional Magnetic Mounts, have a look here.