Dirty grout is often the one thing standing between dingy-looking tile and tile that really pops. Knowing how to clean grout—especially white grout—is essential for floors, walls, and counters to look sparkly clean. While tile is resistant to dirt and stains, the grout lines between the tiles are porous, meaning they will absorb any grease, grime, or spills they come into contact with.
To buff away the stains without harming delicate tiles and finishes, try this at-home grout cleaner made from supplies you likely already have on hand. Cleaning grout will not only extend the life of your tile, but it will keep it looking its best. This is the best method for cleaning grout lines in any spot in your home, whether in the bathroom, in the shower, or on tile floors.
Considerations Before You

Real Simple Home

The Daily Mash
Raw Story
Essentiallysports Golf
New York Daily News Snyde
Newsweek Top
CBS Colorado Politics
AlterNet