What You Need
Grout serves multiple purposes: holding tiles to a surface, keeping water from getting behind tiles, and it can sometimes be a colorful design feature. While tile is naturally resistant to dirt and stains, grout is prone to staining due to its light coloring and porous composition.
If you're cleaning floor tile grout, the likely grime culprits are dirt and mud. Cleaning countertop grout usually involves dealing with food and drink spills. Mold and mildew are most likely what you're dealing with if you're cleaning grout in the shower.
Highly caustic or acidic cleaners like vinegar will stain and slowly corrode grout and tile finishes. Additionally, chlorine bleach will leach color out of tinted grout. Contrary to popular belief, the grout cleaner combination of baking soda and vinegar creates a reaction that cancels out the cleaning power of both ingredients. It essentially leaves you with about the same level of dirtiness you had before cleaning.
Dish soap and soap-based cleaners may not be the best way to clean grout, as they may leave a film on the surface. Lastly, waxy or oil-based cleaners can leave behind a film that will attract more dirt and grime.
Restoring stained grout to like-new brightness doesn't require harsh chemicals such as bleach or vinegar. Even a steel bristle brush can scratch and damage grout lines, which can leave your floor looking dull and stained over time. Simple Green All-Purpose Cleaner penetrates dirty grout to eliminate stains without damaging the grout itself.
Deep clean your tile floors monthly. For tile countertops, a weekly wipe-down will keep them looking new. A regular spray-and-wipe routine after a bath or shower can help you maintain clean bathroom grout.
Note: We do not recommend using Simple Green with a steam cleaner.
TIP: Regular cleaning isn't always enough to prevent future stains and dirt. After cleaning and drying, try using a grout sealer. Reapply sealer every two years or more frequently if the grout is in a high-traffic area.