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This method works well for stubborn mold or mildew stains but is best used with care, especially on lighter grout.
Ingredients:
Bleach (oxygen bleach is gentler than chlorine bleach)
Water
A stiff brush
Instructions:
Dilute the bleach: Mix 1 part bleach with 4 parts water.
Apply the solution: Use a brush or spray bottle to apply the bleach solution directly onto the blackened areas.
Let it sit: Allow the solution to sit for 5-10 minutes to kill any mold or mildew.
Scrub: Use a stiff brush to scrub the joints or grout.
Rinse thoroughly: Make sure to rinse the area with clean water and wipe it down with a cloth to remove any leftover bleach.
3. Hydrogen Peroxide and Baking Soda
This combination is effective for removing black stains from grout lines without the harshness of bleach.
Ingredients:
Hydrogen peroxide (3%)
Baking soda
A small brush
Instructions:
Make a paste: Mix baking soda with enough hydrogen peroxide to form a paste.
Apply the mixture: Spread this mixture onto the affected grout or joints.
Let it sit: Allow it to sit for 10-15 minutes to break down the stains.
Scrub: Use a brush to scrub the grout lines or joints.
Rinse and clean: Rinse with water and wipe clean with a cloth.
4. Commercial Grout Cleaner or Mold Remover
.
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