Why Does Grout Get Dirty and Hard to Clean?
Because grout is below the surface of the tile or stone as you clean the floor, dirt is being pushed into the grout. And, because grout is porous the dirt gets absorbed into the grout, which makes it very hard to remove. In a bath or shower area, the grout gets discolored on the walls because of mold, mildew, and soap scum becoming imbedded in the grout over time.
