Discoloring bathroom shower grout, cleaning?

motifoneJuly 10, 2010

Hi All. So our shower stall is about 6 months old. The whitish grout is showing signs of darkening toward the bottom area of the stall wall. Almost looks like stains or mildew. Whatever it is, seems to be spreading. Cleaning with bleach seems to have no effect. It doesn't seem to be a stain simply on the surface.

Any ideas what it is or causing it? Don't think any shampoos are doing it.

How might I go about cleaning it? Any heavy duty grout cleaners? I do not believe the grout is sealed.

Pics:

http://tinypic.com/r/2a8i0cm/3

http://tinypic.com/r/2gxoev5/3

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graywings123

It looks like it needs a good cleaning with a brush. Any number of products will work; I prefer something like Softscrub with Bleach or Comet Spray Gel Mildew Stain Remover. The scrubbing action with a brush or scrubbie should do the trick. Ventilating the area with a small fan placed on the floor and blowing into the shower stall should help slow down future mold.

Here is a link that might be useful: first pic

    Bookmark   July 10, 2010 at 8:21PM
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motifone

Hmm ok I'll try again. I have tried using a grout brush on it with bleach and barkeeper's friend. Can't seem to remove anything though.

    Bookmark   July 11, 2010 at 4:08PM
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graywings123

The bleach and barkeeper's friend should have taken care of it, as long as you gave the bleach some time to work on the mildew. Maybe try the Comet Gel - it has bleach in it and the gel should help it adhere to the grout. Spray it on and let it sit there for 5 minutes or so, but start scrubbing before it dries. Then rinse.

    Bookmark   July 11, 2010 at 8:49PM
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graywings123

Another thing you can do is mix a bleach and water solution in a spray bottle - maybe 3 parts water to 1 part bleach. Then spray it on the grout and leave it. By the next day, the grout should be white. Avoid overspray and drips on anything this strong bleach solution might damage, such as metal fixtures or a fiberglass tub.

    Bookmark   July 12, 2010 at 1:15PM
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andersons21

Clorox Bleach Pen is awesome for this. Leave it on a long time.

If that doesn't work, there may be a crust of hard water deposit that prevents the bleach from penetrating and killing the mildew. If so, you have to remove that first, THEN kill the mildew.

I SO hate my shower grout.

    Bookmark   July 14, 2010 at 8:21PM
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carpet123

It definitely requires an professional to clean grout as it is quite strong and using different products can lead to any bad impact on whole area..

    Bookmark   April 2, 2011 at 2:26AM
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