High-proof alcohol (70% or higher isopropyl or rubbing alcohol) reliably kills and removes mold on non-porous bathroom surfaces without the harsh fumes of bleach. Spray the alcohol directly onto the moldy grout, caulk, or tile, let it sit for 10–15 minutes, then scrub with a stiff brush and rinse. For porous surfaces like drywall, a diluted bleach solution (1 part bleach to 10 parts water) is more effective, but the key is fixing the moisture problem — run the exhaust fan during and for 20 minutes after every shower, and squeegee walls to dry them. A bathroom mold problem that keeps coming back usually means humidity stays above 60% or the caulk needs replacing. source: Duravit bathroom care guide
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Mold vs Mildew — When to DIY vs Call a Pro
Surface mildew on tile is a DIY job. Structural mold in drywall needs a professional. Here's how to tell the difference.
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