Biological on Grout

How to Remove Mildew from Grout

Black spots in the shower? It's alive.

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Required Supplies

  • Baking Soda
  • Bleach
  • Toothbrush

The Logic Verdict

Bleach + Baking Soda Paste. Liquid bleach runs off too fast. You need contact time.

The Fix

  1. Make a Paste: Mix baking soda and bleach in a bowl until it forms a thick paste (consistency of toothpaste).
  2. Apply: Paint the paste onto the grout lines with an old toothbrush.
  3. Wait: Let it sit for at least 30 minutes (or overnight for bad cases).
  4. Rinse: Scrub and rinse.
  5. Ventilate: Keep the fan on; this creates fumes.

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