First clean the grout. Apply a baking soda paste, or, for darker or stubborn stains, a paste of baking soda and white vinegar. Leave for a few minutes and then brush with a toothbrush. Note: Very old ...

Attach the grout brush to the steam cleaner, release the steam onto the grout, and scrub the grout. If you are cleaning a floor, work in sections from the back of the room toward the door; to clean ...