First clean the grout. Apply a baking soda paste, or, for darker or stubborn stains, a paste of baking soda and white vinegar. Leave for a few minutes and then brush with a toothbrush. Note: Very old ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By James Austin and Ellen Airhart The best way to clean tile and grout in your ...