Sweep or vacuum the tiled area first
Mix warm water with a small amount of dish soap
Apply the solution to the grout with a stiff brush
Scrub the grout lines in small sections
Rinse with clean water and wipe dry
Make a paste of baking soda and water for stains
Spread the paste on the grout and let it sit briefly
Scrub again with a stiff brush
Spray white vinegar on the grout if needed
Rinse thoroughly after using vinegar
Use hydrogen peroxide for stubborn discoloration
Let the peroxide sit before scrubbing
Rinse and dry the area well
Use a steam cleaner for deep cleaning
Apply grout sealer after cleaning and drying
Repeat regularly to keep grout white