Gather all your ingredients needed to make the homemade grout cleaner.
Combine equal amounts of baking soda and hydrogen peroxide – 1/2 cup each and add three tablespoons of dish soap into a bowl. Stir the ingredients to make your homemade cleaning solution.
Apply the homemade grout cleaner directly to the grout using a grout brush or toothbrush. In this step, you can also use your fingers (with gloves on) to apply it directly to the grout. Let it sit for about 10 minutes.
Scrub the grout with the grout brush or toothbrush until it is clean. Try to work in smaller areas, and this will allow you to really focus on areas that need the most cleaning. You may need to use some elbow grease when scrubbing, but it will be worth it.
Once finished scrubbing, wash the area with warm water to remove the grout cleaner residue. If you are cleaning the floors, then take a bucket of warm water and mop the area to remove the grout cleaner residue. You can also take a microfiber cloth and wipe up the area.