Sparkling Castle - for old or dirty grout add 7 cups water, cup baking soda, cup lemon juice, cup vinegar into a spray bottle; Spray onto grout and let sit. Scrub with a brush and mop off excess. Sparkling grout from Sparkling Castle.
DIY Grout Cleaner Having trouble cleaning grout in your home? Use this recipe: 7 cups water, cup baking soda, cup ammonia (or lemon juice) and cup vinegar. Spray on grout, leave for about 1 hour, then scrub vigorously with a scrub brush.
"The fats and oils in soaps create problems with soap scum," Lynn Marie Bower tells Housekeeping Channel. But since body wash is technically a detergent, it's specifically formulated to prevent gross crud from caking up in the shower.