1. Vinegar and ammonia
Mix 7 cups of warm water, 1/2 cup of baking soda, 1/3 cup of ammonia, and 1/4 cup of white vinegar. Spray the mixture directly on the grout and let it set for 5-10 minutes. Now it’s time for a hard work. Use a brush to scrub your grout as hard as you can until you are completely satisfied with the result.
2. Hydrogen peroxide and baking soda
Make a thick paste by mixing hydrogen peroxide with baking soda. Use your fingers or a toothbrush to apply the paste on the grout. After you applied the paste let it set fro…