a grout cleaner and brightener. People claim it takes years off old grout, lifts heavy stains, and works in minutes. I decided to try Zep on the grout of the porcelain floor tile in my bathroom.

Many are also formulated to dry quickly and prevent streaks. Zep Industrial Hardwood and Laminate Floor Cleaner is designed to remove spots while restoring your flooring's shine, and Black Diamond ...