Mold can develop on any surface exposed to prolonged periods of moisture and warmth and this includes your windowsills.

Cold air meeting your windows (which are warmer since your home is heated) condenses and runs down the window to pool on the sills. In addition, the sills tend to collect organic materials like dirt, dust, skin cells, plant pollens, etc. While you can clean and remove mold from a windowsill it’s best to prevent it from growing in the first place.

Here are some things you can do to prevent mold growth.

  • Keep your curtains or blinds open to allow circulating air to dry the moisture.
  • Use a dehumidifier in your home to remove excess moisture.
  • Apply a sealant to trim and windowsills to block moisture.
  • Get rid of the organic materials (dust, dirt, etc.) on the windowsills to deprive mold of its food source. Dust the sills a couple of times per week.
  • Lightly spray sills with Mold Off® to prevent mold growth, do not wipe off.

If you are unlucky enough to still develop mold, don’t panic. Mold Off® is a great mold destroyer as well as a preventer. Spray the sill and let the Mold Off® stand for 24 hours. Wipe it down and, if necessary, repeat. Mold Off® won’t strip paint or wood finish and destroys mold at the roots, not just on the surface.

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I was having so much trouble keeping my new large tile shower clean. It seems that mildew would come back within days. I remembered that I had bought mold off years ago when my old shower needed attention and still had some in the garage. I read the instructions, and sprayed. I scrubbed it, since it had gotten really out of hand, but didn’t see much change originally. Luckily I was forced to wait a few hours to see the results (as the instructions recommend) and when I came back home all the pink was GONE from my grout. I am ordering more and don’t want to ever forget again what a wonderful product this is- and NO strong smell or harsh fumes, as I am allergic to strong cleaners! Thanks for a wonderful product!!
- B.E.