Face masks should be washed and tumble dried each day, study finds - Telegraph.co.uk

University of California finds that particles can build up in masks, meaning regular washing is important.

A recent study by the University of California found that particles can build up in masks and regular washing is important.

"Our results suggest that individuals using homemade fabric masks should take care to wash or otherwise sterilise them on a regular basis to minimise the possibility of emission," he wrote in a recent paper published in Nature. .

The University of New South Wales, in Sydney, said it was important to wash masks after each wearing after finding virus on the inside and outside of both surgical and cloth masks?