You should absolutely have a professional inspection and test before any cleaning is attempted. In serious cases like this, cleaning alone is insufficient and can aerosolize spores, worsening the problem. A proper inspection identifies the moisture source (the AC leak must be fixed first) and the mould species, which dictates the remediation protocol. The landlord is responsible for providing a habitable property under UAE tenancy law, and a professional report provides the necessary evidence to compel proper action.

Do not disturb the area. A certified inspector will conduct air and surface sampling to be analyzed at a microbiology lab, confirming the type and concentration. This scientific evidence is crucial, as it moves the request from a simple cleaning complaint to a documented health and safety issue, ensuring the landlord addresses the root cause and the contamination comprehensively.