grout clear of dirt baking soda and water one to two times a week remember to pick up all the dirt one to two times a week grout clear of dirt baking soda and water the grout in ceramic and porcelain can stain tiles grout clear of dirt baking soda and water tiles baking soda and water one to two times a week tiles one to two times a week grout clear of dirt grout of the tile floors Concrete floors