The Fastest Way to Remove Mildew From Shower Silicone
If mildew is only on the surface, you can often clean it. But when black staining has penetrated deeply into silicone caulk, cleaning may not remove it completely—the fastest lasting solution is usually to remove and replace the silicone.
For surface mildew
Ventilate the bathroom and wear gloves.
Apply a bathroom mold/mildew cleaner according to its label.
Allow the product to sit for the recommended contact time.
Gently scrub the silicone with a soft brush.
Rinse thoroughly and dry the area completely.
Keep the shower ventilated afterward to reduce moisture.
If the black spots won’t disappear
If mildew remains inside the silicone, don’t keep repeatedly scrubbing it. Remove the old caulk completely, clean and dry the joint, and apply new bathroom-grade, mold-resistant 100% silicone.
Important safety warning
Never mix bleach with vinegar, ammonia, acids, or other cleaning products. Dangerous gases can form. Use only one cleaning product at a time and follow its label instructions.
To prevent mildew from returning, run the bathroom exhaust fan during and after showers, improve ventilation, and wipe excess water from the shower surfaces.
Bottom line: Surface mildew can often be cleaned; mildew embedded in silicone usually requires replacing the silicone for a genuinely clean result.
