So, it’s no wonder that mold develops on window sills more frequently than in other areas.
Not only ahealth hazard, mold onwindowsills is also unattractiveif anything because sills are so visible.
The good news is thatmold is easy to removeif you catch it early enough.
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It’s usually worthwhile to start with the vinegar approach because vinegar is less harsh than bleach.
If using vinegar and mechanically abrading the mold doesn’t do it, switch to bleach.
Bleach is a biocide, so it can kill mold.
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What Is Biocide?
A biocide is any substance that is capable of killing living organisms.
Safety Considerations
Always avoid mixing chlorine bleach with ammonia or any cleaning product that contains ammonia.
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Mixing the two results in a toxic gas that, if inhaled, can be fatal.
Tip
Don’t attempt to remove any mold at this time.
Spray the Vinegar
Pour about 1 cup of undiluted white vinegar into the spray bottle.
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Mist the mold area, thoroughly saturating it.
Let the vinegar solution sit for about an hour.
Do not rinse it off or touch it in the meantime.
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Scrub the Mold
Scrub the vinegar solution with the nylon brush.
You’ll need to rub vigorously since mold can become embedded in paint.
Let Dry, Then Assess
Let the window sill dry out, then assess it.
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Every spot of mold must be gone for the window sill to be fully clear of mold.
Even one remaining spot of mold will be enough for the mold to quickly reactivate.
If the mold isn’t gone, then switch to bleach.
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Prepare the Bleach Solution
Clean out the spray bottle.
Clean off the brush, too.
Add 1 cup of bleach and 1 cup of cool water.
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Replace the sprayer to close up the bottle, then slosh the bottle gently to mix.
Spray the Bleach
Mist the bleach solution on the window sill to saturate the mold.
Similar to earlier steps, vigorously scrub the mold on the window sill with the nylon brush.
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Work the bleach solution into the mold.
you could Control Mold.
CDC
Should I use bleach to clean up mold?EPA
Dangers of mixing bleach with cleaners.
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Washington State Department of Health
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The Spruce / Sarah Lee
