Households across the UK are being urged to avoid a common washing machine mistake during the current heatwave, as temperatures are expected to exceed 33°C in the third heatwave of the year. Cleaning experts warn that using washing machines in hot weather without proper ventilation can lead to mould growth.
Why Heatwaves Cause Mould in Washing Machines
Heather Nixon, a cleaning expert at Bio-D, advises Brits to leave washing machine doors and detergent drawers open for several hours after each use. During high temperatures, residual water and detergent build-up combined with humid air create ideal conditions for mould spores and bacteria to multiply rapidly.
"Heatwaves create the perfect environment for mould growth inside washing machines, particularly if moisture gets trapped in the drum or detergent drawer after use," says Nixon. "A washing machine might look clean after it's been used, but residual water, detergent build-up and humid air can encourage mould spores and bacteria to multiply surprisingly quickly."
Simple Habits to Prevent Mould
Nixon emphasizes that simple habits such as ventilating the drum and drawer between washes make a noticeable difference in preventing foul smells and mould. "Leaving the washing machine door and detergent drawers open for several hours after each cycle allows the trapped moisture to fully escape without having to use harsh chemicals," she advises.
Combined with regular wiping and occasionally running a hotter maintenance wash, these small preventative steps can help keep washing machines fresher and cleaner for longer, particularly during the intense hot spells the UK often experiences in summer when fluctuating temperatures and humidity levels create damp conditions.
