The Best Value For Carpet,Tile & Air Duct Cleaning!
If cleaning with bleach or other harmful chemicals has you concerned, you aren’t alone. Many people are turning to equally effective, but less harmful ways to keep their homes just as clean, such as using cream of tartar as an abrasive and bleaching agent.
Remove stains from grout or other porcelain surfaces mixing cream of tartar with baking soda. Rub the compound into any stubborn stain, wash away with clean water to reveal a renewed surface. The acid property in the mixture acts as a abrasive bleaching agent, ideal for tough stains.
Read more at: http://www.wikihow.com/Clean-with-Cream-of-Tartar