You walk into your home and catch a whiff of something damp, earthy, and off. You’ve cleaned, opened windows, maybe even replaced an old carpet—yet the smell stubbornly clings to the air. Could it be mold? Mold can hide in plain sight, growing silently behind walls, under flooring, or in poorly ventilated attics. Left undetected, it damages structures and triggers respiratory problems, headaches, and fatigue.