Can mildew be cleaned from caulk?

Sometimes you can get it cleaned using bleach but be careful if you've used stuff like Comet or Ajax since if there's any of that residue, it can form chlorine gas that is very toxic and can get to you real quick.

I've used bleach to get the black spots out, but it doesn't always work. When that happens, I will cut out the silicone caulk with a razor knife and use a single razor blade scraper like used for cleaning windows after painting to get any still left on the wall panels, but take care to not scratch the panels.

Once the caulk is off, clean the area well and allow it to totally dry. Using a caulk gun and a tube of silicone caulk of your choice, replace the caulk to fill the corners. Have lots of paper towels on hand and a spray bottle of rubbing alcohol. Do one seam at a time with the caulk then lightly spray the seam with the alcohol and use your index finger to push the caulk into the crack and even it out. Wipe any excess on your finger on the paper towels.

Repeat until all seams are caulked. Then allow to dry before using the shower so the silicone can cure.

Zep mold and mildew cleaner. Available at Home Depot.

Gonna throw out Mold Armor also. I've been using that on almost everything lately. Works good.

Sometimes yes, sometimes no.

pretty sure mold armor is just more expensive bleach

quote:

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STAR BRITE Mold & Mildew Stain Remover and Cleaner

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I have used this to remove mildew from multiple surfaces. Hasn’t failed yet. Just spray on and it does all the work.