How to safely clean mold and prevent AC mold?« Back to Previous Page

For a small patch under 1 square foot, you can clean it yourself safely. Wear an N95 mask, gloves, and goggles. Scrub the area with a mixture of detergent and water, then wipe with a diluted bleach solution (1 part bleach to 10 parts water). Dry it completely with a fan. Discard any porous materials like cardboard boxes that have mold growth.

The damp smell suggests a humidity issue, common after humid spells here. The wall behind the closet is likely a cold spot where condensation forms from your AC, creating the perfect damp environment for mold. Simply cleaning the visible patch won't stop it from returning if the moisture source isn't addressed.

You need a professional to inspect two things: the AC unit itself and the room's humidity levels. The AC drain line could be clogged or the evaporator coil dirty, both of which can contribute to excess moisture. A technician should check the unit's drainage and cleanliness. Furthermore, your apartment's indoor humidity may be too high. A mold inspector can use a moisture meter to find hidden dampness in the wall and a hygrometer to measure room humidity, which should ideally be kept below 60% in our climate.

For a recurring issue like this, the most effective approach is a two-step process: a certified mold remediator to safely remove the existing growth and a separate HVAC specialist to diagnose and fix any AC problems causing the condensation. Look for providers who offer before-and-after testing to verify the mold spore count has been reduced to ambient levels.