Cleaning Tough Grout Stains
Finding a recipe for a grout cleaner that works best is based on the individual and the condition of the grout. For extremely dirty grout, a heavy-duty cleanser is a must. Always wear gloves before using any household chemical. Mix 1 part liquid chlorine bleach with 4 parts water. With a firm-bristled cleaning brush, apply the chlorine mixture to the grout, scrubbing well but not so hard as to scratch the tile. For hard-to-reach places use a firm-bristled toothbrush. Rinse the grout well. Next, mix 1/4 cup white vinegar and 1/3 cup ammonia with 4 cups of water in a large spray bottle or in a bucket. Wear a mask as the ammonia will be strong and open any doors and windows for ventilation.
Remember to never mix bleach with an ammonia-based cleanser.
Spray or wipe this mixture on the grout and allow mixture to remain for several minutes. Using the scrub brush, scrub the grout well. Rinse and repeat this process; only this time, no rinsing is required. The tile will shine and the grout should be nice and clean. Always apply a sealer to grout to keep it from becoming dingy.
Regular Grout Maintenance
One of the most valuable tools in a medicine cabinet is hydrogen peroxide. What a lot of people don't know is that peroxide can be used for cleaning as well as first aid. Mix 1/2 cup of peroxide with 1 cup of water. Pour the solution into a spray bottle, and spray the grout. No need to rinse after applying. If there is an area of grout that is particularly dirty, use a soft brush and scrub. This is when the solution will need to be rinsed and reapplied as the dirt and gunk from the grout will be unsightly if not rinsed away.
This solution can be kept close at hand and sprayed on the tile after every shower if the grout in question is in the shower. This will help to keep the tile sparkling and the grout clean.
White vinegar can be poured into a spray bottle and sprayed onto the tile. Not only will this clean the soap scum off of the tile, it will help to keep the grout from forming mold and mildew.