If only a bit of the tile sticks, you can pull it off the wall. You may pull off some of the paint/wall with it if it's too stuck. When you pull it off, you'll find that the metal tile bends and the tiles may come apart from the adhesive layer. If the tile was stuck down well and you remove the tile, you likely won't be able to reuse the tile. I had a few small strips that didn't stick well; this was caused because I pulled the tile off the wall to fix its position and the tile pulled away from the adhesive backing. Most of the tile was fine, but one strip came apart. I used a knife to cut away just the strip, then cut a same sized strip off a piece of tile that was leftover, and placed it in the spot. This is a GREAT way to fix any cosmetic issues.