Apply Bleach to Grout - Leave for 10 minutes - use nail brush to scrub grout lines - rinse with water.
Peroxide
Sprinkle baking soda then pour vinegar on it it should bubble out
After cleaning & stain is gone, remember to SEAL grout to help retard mold return.
https://www.hometalk.com/diy/clean/bathroom/the-best-way-to-remove-mold-mildew-with-2-ingredients-no-bleach-33077514
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Apply Bleach to Grout - Leave for 10 minutes - use nail brush to scrub grout lines - rinse with water.
Peroxide
Sprinkle baking soda then pour vinegar on it it should bubble out
After cleaning & stain is gone, remember to SEAL grout to help retard mold return.
https://www.hometalk.com/diy/clean/bathroom/the-best-way-to-remove-mold-mildew-with-2-ingredients-no-bleach-33077514
The Best Way to Remove Mold & Mildew With 2 Ingredients (NO Bleach!)