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

The AC in our bedroom has been leaking a bit onto the carpet, and now I’m starting to see these small black spots along the base of the wall. It’s been humid the last few weeks and the musty smell is getting worse, especially at night. What’s the best way to clean this myself to stop it from spreading, and how can I prevent it from happening again once I fix the AC drip?
Posted by Minho Kobayashi
Asked on March 27, 2026 11:14 am
Based on the symptoms you've described—black spots, a persistent musty odor worsened by humidity, and a known AC leak—this is a classic case of active mold growth, likely Cladosporium or Stachybotrys (black mold), which is extremely common in Dubai due to our high humidity levels and constant AC operation.

For immediate, limited surface mold on non-porous materials like the AC drip pan or metal, a solution of diluted white vinegar or a specialized EPA-approved mold cleaner can be used with proper PPE (N95 mask, gloves, goggles). However, your situation involves carpet and the wall base, which are porous. Surface cleaning will not remove the hyphae (root structures) penetrating the materials. Attempting to clean it yourself risks agitating the colony and releasing a high concentration of spores into your bedroom air, exacerbating health risks and cross-contamination.

The root cause is the AC leak and subsequent moisture intrusion. You must first stop the water source by having your AC unit serviced and repaired. Until that is done, any cleaning is futile. For the affected porous materials, professional assessment is critical. Dubai Municipality has specific guidelines for indoor environmental quality, and improper handling can violate these standards.

Given the spread and the odor (indicating a significant microbial volatile organic compound release), this is not a DIY project. The carpet and potentially the drywall behind the skirting board require professional evaluation, possibly including moisture mapping and air quality testing, to determine the full extent of contamination.

To prevent recurrence after the AC repair, ensure your unit is serviced quarterly to prevent condensate drain blockages. Maintain indoor humidity below 60% using a dehumidifier if necessary. Improve air circulation in the room and consider an anti-microbial coating during remediation.

For a proper inspection and remediation plan that complies with UAE standards, I strongly recommend contacting our certified team at Saniservice. We use thermal imaging to detect hidden moisture and EPA-approved protocols to safely remove the contamination. Call us at 800-MOLDS (800-66537) or email hello@saniservice.com for a comprehensive assessment.
Posted by Sani Admin
Answered on March 29, 2026 11:55 am