I've never had any luck in trying to fix ceramic tile. I have floor tile on my countertop, and if a tile gets messed up I chip it out and replace it with a new tile. I have about a dozen unused tiles left over from installing the floor and countertop over 10 years ago. But replacing a tile is a tough job, so I have about three or four now that needs replacing. I'll get a round tuit someday.
