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Which? warning over common mistake that is making homes colder and bills higher
Which? says wet washing on radiators can slow heating, raise energy use and increase mould risk, and it recommends airers or heated drying racks instead.
In a recent TikTok video, consumer organisation Which? advises households to stop drying wet laundry directly on radiators, warning that damp clothes increase mould risk and force heating systems to work harder.
Placing damp clothes on radiators creates a barrier to heat, potentially leaving rooms taking longer to warm up and increasing energy use while releasing moisture that raises mould risks.
Which? tested indoor drying methods and found the cheapest option depends partly on washing load size; unheated airers use no electricity, while heated models take four to five hours for small cotton loads.
South Kesteven District Council recommends opening windows wider and using extractor fans when drying clothes, while the Energy Saving Trust notes that condensation forms when moisture meets cold surfaces like windows.
The trust also advises addressing underlying damp causes like leaks or damaged guttering, as persistent condensation, musty smells, or mould can indicate groundwater entering walls that require quick intervention.