Wear an N95 mask, gloves, and eye protection. A simple water and detergent scrub can be more effective than bleach, which doesn’t prevent regrowth on porous surfaces. Thoroughly dry the area with a fan after cleaning. However, if the musty smell persists after cleaning, the mold has likely penetrated the wallboard or behind it, which is a job for professionals.

For recurring issues, hidden growth, or if anyone in the home has respiratory sensitivities, a professional assessment is strongly advised. Reputable remediators here don’t just clean the visible spot; they use moisture meters to find the full extent of the damage and air scrubbers to contain spores during removal. The cost for a small, contained area like a closet is typically on the lower end of the scale, but always request an on-site inspection for an accurate quote that includes leak repair, removal, and drying.