What Kills Black Mold in Shower

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Ugh, black mold in the shower is the worst 😩 but it is very killable. Here’s what actually works, from strongest to mildest, so you can pick based on how bad it is.

The heavy hitters (kill black mold fast)

1. Bleach (sodium hypochlorite)

  • Mix 1 cup bleach + 1 gallon water

  • Spray, let sit 10–15 minutes, then scrub

  • Works great on tile, grout, glass

  • ⚠️ Don’t mix with vinegar or ammonia (toxic gas)

2. Hydrogen peroxide (3%)

  • Spray directly (no dilution)

  • Let sit 10 minutes

  • Scrub and rinse

  • Kills mold và lightens grout stains

  • Safer smell than bleach

Natural but still effective

3. White vinegar

  • Spray straight vinegar

  • Let sit 30–60 minutes

  • Scrub and rinse

  • Surprisingly good at killing mold roots

  • Smell fades after drying

4. Baking soda (for scrubbing)

  • Mix baking soda + water into a paste

  • Scrub moldy grout or caulk

  • Best paired with vinegar or peroxide

For stubborn silicone caulk mold

Black mold loves keo silicone. If it’s deep inside:

  • Soak paper towels with bleach or peroxide

  • Press onto caulk

  • Leave overnight

  • If stains remain → replace the caulk (sometimes it’s the only real fix)

What NOT to rely on

  • ❌ Just hot water

  • ❌ Dish soap alone

  • ❌ Essential oils (not strong enough for established mold)

How to keep it from coming back

  • Run bathroom fan 20–30 min after showers

  • Squeegee walls/glass

  • Wash shower curtain monthly

  • Re-seal grout if porous

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