cups water cup vinegar cup lemon juice cup baking soda ◾Mixing them to make your natural grout cleaning solution. Apply the solution to the grouts, and scrub grouts with a toothbrush or small scrub brush to see immediate results
Use a little toothpaste, mix in one teaspoon baking soda plus one teaspoon of hydrogen peroxide, half a teaspoon water. Thoroughly mix then brush your teeth for two minutes. once a week until you have reached the results you want.