If a tile needs to be removed, apply heat with a hair dryer to soften the adhesive. Use a putty knife on the backside and slowly apply outward pressure to release the tile from the wall. The adhesive is engineered not to be removed so caution should be taken so as to not damage the wall. Any removed tiles may be unusable. ACP is not responsible or liable if you damage your walls. If the adhesive is destroyed but the tile face is fine, you can try using PL Premium adhesive to reapply the tile.