The Best Product for Cleaning Grout and Mildew


Grout, the cementlike paste holding tiles in place, often becomes dirty over time. The key to keeping tiles fresh and clean is to purchase the correct cleaning product. Bleach is the most effective product for cleaning dirty tile grout.

Types of Bleach

  • There are two main types of bleach on the market -- chlorine bleach and oxygen bleach. Both types of bleach effectively clean grout; however, Ask the Builder's Tim Carter, writing for "The Washington Post," recommends using oxygen bleach.

Benefits of Oxygen Bleach

  • Oxygen bleach has several benefits over chlorine bleach. First, oxygen bleach is nontoxic and produces no harmful fumes, making it safe for people sensitive to chlorine bleach. Second, oxygen bleach does not stain clothing and is safe for colored grouts.


  • Oxygen bleach comes in powdered form; you mix it with warm water until it dissolves. Pour the solution on the grout until it is visibly wet. Allow the bleach to sit for at least 30 minutes to allow oxygen ions to break up the stains, recommends Tim Carter. Pour more solution on the stains and scrub to get grout clean.

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