Scrubbing grout for hours and ... high natural acid content enhances the disinfecting effect. An effective method for cleaning tiles is to use toilet cleaner. Mix half a quart of toilet cleaner ...

Cue Zep, 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 ...