Things You'll Need
Sponge or towel
Grout can easily become dirty. In moist areas, such as the bathroom or shower, mold may be the problem. In the kitchen food and daily traffic will add to the dirt. Rather than resort to chemical grout cleaners, first try a natural vinegar solution.
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Add equal amounts of water and white vinegar to a spray bottle. Shake the bottle to mix the ingredients.
Spray a small section of grout.
Use a stiff brush to scrub the grout. Srub a small section at a time using a circular motion.
Rinse with water and remove any excess moisture with a dry sponge or towel.
Vinegar and Baking Soda
Sprinkle a small amount of baking soda on the tiles.
Pour vinegar directly onto the baking soda. Allow the mixture to bubble for a few minutes.
Spray with a little more vinegar and then rinse with water.
A toothbrush may be used in place of the scrub-brush. The small head of the toothbrush will allow you to get into the groove of the grout. Toothbrush bristles may not be stiff enough.