For most, February is spent indoors, which makes indoor air quality a chief concern. So, battle mold and mildew in all its incarnations to help your family breathe easier. First, have the mold tested by a pro if it's making you sick; it could be black mold. If not, clean it the DIY way with hot water and baking soda. Mildew in the shower can be prevented with a simple spray of vinegar or tea tree oil and water.