We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Mold is a living, growing organism—a type of fungus—that thrives in damp environments.

Q: How can I remove mold and orange-ish scum from the grout and other surfaces in my shower? A: Grout, a cement-based material, is porous. In a shower, it absorbs moisture and typically stays damp for ...