Hi. Make a paste of baking soda, dish soap and warm water. Cover the grout with the paste. Once covered use a stiff bristle broom and scrub. Rinse well. Allow to dry then use a grout sealer.
If the grout is a white grout that is no longer white, use Tilex. Put only on grout, allow to sit for an hour, then use the broom as above, dry and seal. Do this only on white grout. It will cause colored grout to be blotchy.
There's lots of choices, all involve determining what made it dirty? In the kitchen, there are air-borne grease vapors, in the bathroom there are high humidity conditions and sometimes mold, in the foyer it may just be mud and dirt.
In all cases, I would take a dry toothbrush and a shop vac and see what dry brushing does.
Lots of people use white vinegar solutions which won't cut grease vapors and I would add a very small amount of a clear detergent to my scrubbing water. Some people use toothpaste. Some people use a TSP solution. And chlorine bleach is not to be used, it's too stinky and too hard to clean up. If you want to use a little bleach, use an oxygenated bleach, like Oxyclean.
Use the shop vac in wet-mode and vac up the cleanser, rinse, rinse rinse and then vac again.
I would use a nylon scrub pad in addition to the old toothbrush.
Wear gloves if you're working with bleach solutions and wear old clothes and old clean shoes. Make sure the room is well -ventilated.
I have a very pale grout in my kitchen. The water from cleaning the tile runs down off the tile onto the grout and dries there. It doesn't take long for the grout to get really gray. I use hot water and a toothbrush to clean mine and dry it with a soft towel right after cleaning the area I usually do a strip a couple of feet long at a time). Change the water as soon as it starts getting cloudy or you deposit dirty water on it again. I don't do this every time I wash the floor, but when I notice it getting darker. I always wash floors on hand and knees, I think it just gets cleaner than mopping. Hubby uses a Swiffer, It cleans, but redeposits a lot of dirt.
Mild detergent and tooth brush or denture brush (they have much stiffer bristles!) Just be sure Not to try a harsh chlorine that will harm the grout. My dealer said “be gentle”, repairing that is a lot of work!
I use Listerine mouthwash. I pour into a clean mustard or ketchup bottle, the kind u take on a picnic. I squeeze some on the dirty grout and let it sit for a while and scrub with a small stiff brush or toothbrush and then rinse with water using a clean yacht mop. Works for me. Good luck.
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Hi. Make a paste of baking soda, dish soap and warm water. Cover the grout with the paste. Once covered use a stiff bristle broom and scrub. Rinse well. Allow to dry then use a grout sealer.
If the grout is a white grout that is no longer white, use Tilex. Put only on grout, allow to sit for an hour, then use the broom as above, dry and seal. Do this only on white grout. It will cause colored grout to be blotchy.
There's lots of choices, all involve determining what made it dirty? In the kitchen, there are air-borne grease vapors, in the bathroom there are high humidity conditions and sometimes mold, in the foyer it may just be mud and dirt.
In all cases, I would take a dry toothbrush and a shop vac and see what dry brushing does.
Lots of people use white vinegar solutions which won't cut grease vapors and I would add a very small amount of a clear detergent to my scrubbing water. Some people use toothpaste. Some people use a TSP solution. And chlorine bleach is not to be used, it's too stinky and too hard to clean up. If you want to use a little bleach, use an oxygenated bleach, like Oxyclean.
Use the shop vac in wet-mode and vac up the cleanser, rinse, rinse rinse and then vac again.
I would use a nylon scrub pad in addition to the old toothbrush.
Wear gloves if you're working with bleach solutions and wear old clothes and old clean shoes. Make sure the room is well -ventilated.
I have a very pale grout in my kitchen. The water from cleaning the tile runs down off the tile onto the grout and dries there. It doesn't take long for the grout to get really gray. I use hot water and a toothbrush to clean mine and dry it with a soft towel right after cleaning the area I usually do a strip a couple of feet long at a time). Change the water as soon as it starts getting cloudy or you deposit dirty water on it again. I don't do this every time I wash the floor, but when I notice it getting darker. I always wash floors on hand and knees, I think it just gets cleaner than mopping. Hubby uses a Swiffer, It cleans, but redeposits a lot of dirt.
Mild detergent and tooth brush or denture brush (they have much stiffer bristles!) Just be sure Not to try a harsh chlorine that will harm the grout. My dealer said “be gentle”, repairing that is a lot of work!
I use Listerine mouthwash. I pour into a clean mustard or ketchup bottle, the kind u take on a picnic. I squeeze some on the dirty grout and let it sit for a while and scrub with a small stiff brush or toothbrush and then rinse with water using a clean yacht mop. Works for me. Good luck.