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

The black spots are likely mould, fuelled by Dubai's high humidity and the condensation from your AC unit. For a small area like this, cleaning it yourself can be safe and effective if done correctly. However, because you have children experiencing respiratory symptoms, a professional inspection is strongly advised to identify the species and the moisture source, as some moulds can exacerbate coughing and allergies.

To clean safely, first contain the area. Gently mist the mould with water to prevent spores from becoming airborne. Wear an N95 mask, gloves, and eye protection. Scrub the area with a solution of detergent and water. Avoid bleach, as it only discolours mould and does not address the root cause. After scrubbing, dry the surface completely with a fan.

The AC unit is almost certainly contributing to the problem. Constant operation without proper maintenance leads to moisture buildup inside the unit and ductwork, creating a perfect environment for mould to grow and spread spores throughout the room. To stop it from coming back, you must address the AC. Have the internal cooling coils, drip pan, and blower wheel professionally cleaned to remove any existing biological growth. Ensure the unit's drain line is completely unclogged to prevent water from backing up and leaking.

For long-term prevention, manage indoor humidity. Use a dehumidifier in the bedroom, especially during the more humid winter months. Ensure your AC unit is correctly sized for the room and that it is set to a temperature that reduces condensation formation on cold surfaces. Improving room ventilation can also help. Ultimately, a full assessment by a company with microbiology lab capabilities can identify the specific mould type and the exact moisture pathway, which is the key to a permanent solution.