For a small, surface-level issue, you can attempt a careful DIY clean using a mixture of distilled white vinegar and water (50/50 solution) or a specialized, non-chlorine, fume-free grout cleaner from a local hardware store. Scrub gently with a soft brush to avoid damaging the grout and spreading spores. Crucially, ensure the bathroom is extremely well-ventilated during this process—open windows, run the exhaust fan for hours afterwards, and keep your children completely away from the area until it is fully dry and any fumes have dissipated.

However, that earthy smell is a significant red flag. It often indicates that moisture has penetrated behind the tiles and into the wall substrate. Surface cleaning will be a temporary fix at best, as the mold will simply regrow from the hidden moisture reservoir. This is a serious concern for indoor air quality and your children’s health, particularly for a toddler with developing lungs.

In such cases, a professional inspection is not just recommended; it’s essential. We use borescopes to inspect behind walls and air quality tests to identify spore types and concentrations. Remediation in the UAE must adhere to strict DHA and DM guidelines, especially for occupied residences. For a permanent, kid-safe solution, the source of the moisture must be identified and eliminated, and the affected area properly contained and remediated.

Given your description, I strongly advise against a DIY approach. Please call us for a professional assessment. Call 800-MOLDS or 800-66537 or email hello@saniservice.com to schedule an inspection. We can determine the full extent of the problem and provide a safe, guaranteed remediation plan.