DIY bleach cleaning is not advised for this scenario. Bleach only removes surface discoloration and does not address the moisture source or the hyphae (roots) growing within porous materials like drywall. In Dubai’s high humidity, with windows closed and AC running, any remaining moisture will cause it to return quickly. More critically, improper cleaning can aerosolize spores, worsening indoor air quality and potentially spreading the contamination.

The AC leak is the root cause and must be repaired by an HVAC technician first. The hidden wall cavity behind the wardrobe is a serious concern, as mold growth there is often more extensive than what is visible. A proper remediation involves isolating the area, removing affected porous materials, and using HEPA filtration to capture spores, followed by antimicrobial treatment.

For your family’s health and to prevent structural damage, the most effective course is to first get a professional inspection to assess the hidden damage and identify the mold species. This provides a clear remediation plan. Reputable companies in Dubai will provide detailed scopes of work and documentation, which is essential for a permanent solution.