If your towel bar has no visible screws, it is likely that it is installed with either toggle anchors or molly bolts. To remove the towel bar, you will need to locate the anchors or bolts that are holding it in place. Locate the toggle anchors: One way to do this is to gently tap the wall around the towel bar with a hammer. The toggle anchors will make a hollow sound when tapped, while the surrounding wall will sound solid. Once you have located the toggle anchors, use a pair of pliers to pull the wings of the anchors out of the wall. Locate the Molly bolts: Look for small holes in the wall behind the towel bar where screws might have been inserted. You can use a small screwdriver to push the metal sleeves inside the wall. Then, you can pull the towel bar out. It’s important to note that if you’re unsure about the type of anchors that have been used you should consult with a professional to avoid any damage to the wall or tiles. Also, if the towel bar is installed with adhesive, you may need to use a special adhesive remover to remove it, or you may need to remove it by scoring the adhesive with a utility knife and then gently prying it away from the wall.