Dear James: The grout on the bathroom tiles is crumbling and looks dark even after using bleach. I don’t want to remove the tile and redo it. Can I just replace the grout myself?—Damon W.
Dear Damon: You probably won’t have to remove any tiles in the discolored grout areas. Where the grout is crumbling, water may have gotten behind the tiles and loosened them and damaged the wallboard. Carefully pry on those tiles and remove any that are loose. Examine the wallboard for deterioration.
