How do I remove black mildew from tub and tile caulk?

Question

One corner in my shower is stained with black mildew. I have tried bleach, soft scrub w/bleach, comet, and barkeepers friend. Nothing has worked. Any ideas?

Answer 1

pull it all out and re-caulk it. Mildew gets into the caulk and it won't come out.

Answer 2

I use Tilex as it has bleach and that is what kills the mildew. Sometimes the stains are hard to get out completely. You might also try Clorox's bleach pen, it works well since it is a thick gel.

Answer 3

tilex mold and mildew is the best BUT wear a mask!!! and dont let it touch any cloth because it will take the color out just like bleach. it you recaulk use a silicone caulk the has an antifungal mixed in and make sure it is kitchen/bath.

Answer 4

In basic training, we scrubbed at such mildew with old t-shirts, scrub pads and tooth brushes and massive amounts of bleach until our fingers practically bled. I lost half a nail. Good luck!

Answer 5

That's not mildew. You can try Bam it new to the market place. But plumbers have used it for a long time.

Answer 6

Take down the wall & put up a new one you might have mold behind the wall or try using vinegar & water it works for everything else.I use 4c of hot water to 2Tbsp of vinegar put it in a spray bottle.Good Luck

Answer 7

I would scrape off existing caulk, and apply new caulk that has micro-ban in it.

Answer 8

cut/scrape/pull out the caulk and replace it with new silicone caulk

Answer 9

You can try muriatic acid, but wear a mask, gloves, and eye protection. Vent well.

Answer 10

usually if you spray it with bleach & let it set it will turn back.
if not, scrape/peel it out and replace it.