Mould loves warm, damp bathrooms. Cleaning it off is the first step, but stopping it from coming back is about moisture control.
Ventilate after every shower
Run the exhaust fan for at least 15 minutes after showering, or open a window to let moisture escape.
Dry wet surfaces
A quick squeegee of the shower screen and tiles stops water sitting in the grout.
Clean little and often
A weekly spray and wipe of problem areas prevents spores from taking hold.
