Preventing growth inside the AC unit itself is more complex. The constant high humidity in Dubai, combined with cold evaporator coils, creates an ideal environment for mold. While cleaning the visible parts offers a temporary fix, the mold colony is likely established deep within the system on the coils and drip pan.

For a verifiable solution, a professional inspection is recommended. They use borescopes to assess the internal evaporator coil and air duct conditions, which is the only way to confirm the extent of the growth. Remediation involves applying specialized, non-toxic biocides to the system’s interior and using HEPA vacuums to remove spores. To prevent recurrence, ensure your AC’s drain line is clear and consider having a UV-C light installed inside the unit, which can help reduce microbial growth on the coils.