What to do
For a small patch on a hard, non-porous bathroom surface, address the water source, scrub the visible mold with detergent and water, then dry the surface completely. Porous materials and larger or recurring problems may need professional assessment.
Step-by-step
Find and fix the moisture source
Check for leaks, condensation, or persistent dampness. Cleaning the surface without correcting moisture allows the problem to return.
Limit the task to a manageable hard surface
Identify the material and the size of the affected area. Porous ceiling panels, wallboard, or other absorbent materials can be difficult to clean fully.
Scrub with detergent and water
For a small area on a hard surface, remove visible mold by scrubbing with water and a detergent appropriate for the surface. Follow the cleaner’s label and protect yourself as appropriate for the task.
Dry completely and monitor
Dry the surface promptly. If growth returns, moisture remains or hidden damage may need attention.