How to Remove Black Stains from Floor Grout

a stronger cleaning boost.

2. Hydrogen Peroxide and Baking Soda

Hydrogen peroxide is commonly kept in household first-aid supplies, but it can also be useful for certain cleaning jobs. When used appropriately, it may help loosen stains and brighten some types of grout.

 

For stubborn grout stains, you can make a simple cleaning mixture:

Sprinkle a small amount of baking soda over the grout.
Add enough hydrogen peroxide to dampen the baking soda and form a paste.
If necessary, add a tiny drop of mild dishwashing liquid to help loosen