Grout is a type of plaster which fills in the cracks between tiles, keeping them together and preventing damage to the sides of the tiles. With time, grout can get dirty, especially the grout used around kitchen and bathroom tiles which are exposed ... more

For old grout, scrub with wax stripper or heavy-duty cleaner solution and a grout brush to get it as clean as possible. Use bleaching cleanser on stubborn spots. Rinse well. After it's good and dry, apply a coat of masonry sealer to keep it from ... more