If you see unsightly black stains or spots on the grout lines of your shower, on the back of your shower curtain, on the walls or on items stored in a damp basement, it’s probably mold. Molds thrive in damp, humid, warm environments. So bathrooms, kitchens, damp basements, and window sills are prime areas for mold growth.

Molds or mildew are tiny fungi that are transmitted by microscopic spores. Molds can be black, grey-green, green, white or a …