How do I clean black mold stains in the grout in my shower?

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I have black stains in my shower. They are in the grout. I have used every type of cleaner you can think of and nothing seems to work.

It seems like my only other option is to paint over them. Can somone tell me how to get them out?
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  1. Judy says:
    June 6, 2011 at 5:00 pm

    I’ve used toilet bowl cleaner and baking soda on them. Allow that to sit on the grout for about a half hour. Then use White vinegar and warm water to rinse it off. If you have a strong coarse brush you can work into the grout. Sometimes the grout just needs to be replaced if it is old.. I’ve always had good luck using the toilet bowl cleaner with bleach such as clinging type.
    Hope that will help you.

  2. Rehana A says:
    June 6, 2011 at 5:00 pm

    You Need:

    Grout saw
    Rotary tool and carbide bits
    Eye protection
    Masking tape
    Grout scraper
    Scraper with teardrop bit
    Dust mask

    Cover the floor, tub or surface below the tiles with a drop cloth to protect it from damage.

    Protect the edges of the tiles beside the grout lines with masking tape to help guard them from accidental nicks.

    Wear eye protection and a dust mask.

    Removing Grout:

    Consider using hand tools such as a carbide tipped grout saw and a carbide tipped grout scraper available from a tile store or home center. The saw has a blade about a one and a half inches long mounted on what looks like a bent screwdriver. The grout scraper looks like a screwdriver with a triangular head on it. Both are less than $10 and readily available from home centers or tile stores.

    Consider using power tools as an option, like a rotary tool with carbide bits sized to fit the width of your grout lines. In addition, there are special attachments for rotary tools specifically designed for grout removal, but these cost in the area of $100 and only fit certain rotary tools.

    Start by cutting a groove in the old grout with the grout saw or the rotary tool. If the grout is porous it will only take a few passes to cut a groove. However, if the grout is hard you’ll have to work harder to make that initial groove. Apply firm even pressure to cut a smooth groove.

    Expand the groove with the grout scrapper. The scraper literally pulls the grout out of the groove.

    Alternatively, use a hammer and chisel to expand the groove by tapping the chisel gently with the hammer.

    Chisel towards the open space in the grout so you don’t damage any of the tiles once you’ve removed some of the grout.

    Continue the process, cutting grooves, expanding them and using a combination of tools to get most of the grout out.

    Use a scraper with a teardrop end on it to remove the last of the grout.

    Step 9Clean the newly opened grout lines well so the new grout will adhere.

  3. Laura says:
    June 6, 2011 at 5:00 pm

    Bleach will lighten but it will go back to how it was after a week or so. Nothing will get rid of it short or replacing the grout. I learnt that the hard way. Just make sure you don’t let it get any worse. As soon as that orange stuff starts to build up wipe it off that’s the start of mould

  4. Sabbir says:
    June 6, 2011 at 5:00 pm

    Black molds are very dangerous and usually grow due to water damage. Try to use chlorine or, bleaches to remove that mold, otherwise you can also seek service from a mold expert.

  5. fayestandfield says:
    June 6, 2011 at 5:00 pm

    Try pouring White King over them and leave for about 30 minutes and then rinse off

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