Could deep cleaning residue or mold be causing our coughs?« Back to Previous Page

Deep cleaning can disturb significant dust and microbial growth, especially in a humid climate like Dubai where AC systems run year-round. The white powdery residue on dark tiles is a strong indicator of dried, aerosolized cleaning solution that was not properly rinsed and extracted. When the AC operates, it can circulate these fine particles and any other allergens that were agitated during the process.

However, the timing of the symptoms coinciding with the AC kicking on is a major red flag. The cleaning process may have disturbed established mould colonies within the ductwork or on the AC evaporator coil, dispersing spores and mycotoxins throughout your home. This is a common issue in villas here, as high humidity and condensation inside AC units create an ideal environment for microbial growth.

For a definitive answer, you need to identify the specific airborne contaminants. A professional indoor air quality inspection is the most reliable step. This involves air and surface sampling, which is then analyzed by an accredited microbiology lab to identify the types and concentrations of particles, including mould species, bacteria, and chemical residues. This data-driven approach is the only way to know if you're dealing with irritant dust, a mould issue, or a combination of both.

Until you can get an assessment, regularly wipe surfaces with a damp cloth to remove the visible residue and consider using high-quality air purifiers with HEPA filters in the main living areas and bedrooms to help reduce the circulating particulate matter.