picture of grout "under" desk - shows less wear and tear.
How do I clean the grout in my tile floor?
Original grout on tile floor was a light grey color. Over time, it's become very dark. I've actually tried cleaning the grout in the entire house using a "toothbrush" and powerful acid-like cleanser. Not an optimal solution with less than stellar results.
picture of grout in heavy traffic area near kitchen. Grout is much darker.