Covid: How best to wash your reusable face mask - and what you shouldn't do when cleaning it

How often do you wash your reusable face mask? According to a YouGov survey, only 13% of people in the UK are washing them often enough and in the correct way - so what is the best and most effective way to clean a mask? Delia Cannings, a health and safety cleaning expert explains what you should and shouldn't be doing when you wash a reusable mask.