While small, surface-level mold on non-porous tiles can sometimes be addressed with a diluted detergent solution (never bleach, as it is ineffective on porous surfaces and can exacerbate the problem), your case is different. The mold is on a porous wall and is a direct result of a moisture intrusion from your AC system. Simply scrubbing the visible spots is a temporary fix; the hidden moisture within the wall cavity will guarantee its rapid return and further spread, potentially compromising the structural integrity of the partition wall and impacting indoor air quality.

Furthermore, improper DIY removal can aerosolize harmful mycotoxins, spreading contamination throughout your apartment. Dubai Municipality has guidelines for maintaining healthy indoor air quality, and professional remediation ensures compliance and safety.

The correct protocol involves first identifying and repairing the AC leak to eliminate the moisture source. A certified mold inspector should then conduct air and surface sampling to determine the spore count and species. Remediation involves isolating the area with negative air pressure, safely removing and disposing of contaminated porous materials like drywall, and using industrial-grade HEPA filtration and antimicrobial agents to clean the area.

For a definitive solution and to protect your health and property, I recommend contacting a professional. Saniservice specializes in such scenarios and can provide a thorough inspection and remediation plan. You can reach them at 800-MOLDS (800-66537) or hello@saniservice.com.