The two leading causes for buildup of mold on windows and window sills are leaks and condensation. Here are four ways to prevent mold from growing in your window sills:
1) Change thermostat temperature depending on the season. 75-78 degrees during the Summer and 70-74 degrees during the Winter.
2) Use a dehumidifier
3) Maintain good airflow
4) Clean window sills regularly.
