Why mould keeps returning
Mould needs moisture. Bathrooms, laundries and kitchens with poor ventilation give it exactly that. If the room stays damp after showers, mould will keep growing back however well you clean it.
Common causes are an exhaust fan that's missing, blocked or switched off too soon, a window that's never opened, a leaking shower or pipe, and wet towels left in the room.
Cleaning small patches safely
NSW Health advises that small areas of mould on hard surfaces can usually be cleaned with a mild detergent or vinegar solution, then wiped with clean water and dried thoroughly.
Never mix cleaning products, especially bleach with other cleaners. Open a window, and consider gloves and a mask. Porous materials like plasterboard, carpet or fabric that are heavily affected may need professional cleaning or replacement rather than a wipe-down.
Habits that stop it growing back
Run the exhaust fan during every shower and for at least 15 to 20 minutes afterwards, or open a window. Wipe down shower screens and tiles after use. Hang towels to dry outside the bathroom where you can. Check that the exhaust fan actually pulls air. A tissue held against the cover should be drawn in. Fix leaks quickly, and let fresh air and sunlight in on dry days.
When to call in help
Call a professional if the mould covers a large area, keeps returning after cleaning, has grown into plasterboard or carpet, or follows a leak or flooding. Renters should report mould and any leaks to their landlord or agent. If the cause is a building problem, a plumber or builder may need to fix it before cleaning will last.
Need a hand?
Surface mould cleaned from ceilings, walls, grout and silicone, with honest advice. See our mould cleaning service or ask for a free quote.