Sweep or vacuum the floor to remove loose dirt
Mix warm water with a small amount of dish soap
Apply the solution to the grout with a spray bottle or sponge
Scrub the grout lines with a stiff-bristled brush or grout brush
Wipe away loosened grime with a clean damp mop or cloth
For stubborn stains, make a paste of baking soda and water
Apply the paste to the grout and scrub gently
Use a vinegar and water solution only if the tile is not natural stone
Rinse the floor thoroughly with clean water
Dry the floor with a clean towel or microfiber cloth
Repeat as needed for heavily soiled grout
Seal the grout after cleaning if it is unsealed or needs resealing