As my family were staying over Christmas, I wondered if I should wash the bedding. They hadn’t been for over a year but had only stayed a couple of nights, so surely not. Then I thought about how dusty the duvet covers might be. So I asked my sister and a good friend, “Do you think I need to wash the sheets and duvet covers on the spare beds? It has been over a year.” They replied, “Na, it’ll be fine. Why make work for yourself.” So I didn’t! I did look up Google but the information they gave was very depressing. ‘Wash duvets and pillows every two to three months’ said some sites—apparently dust mites can trigger allergies. Oh dear. Then another site said at least twice a year, another said at least once a year. I don’t actually wash pillows, just hang them out to air! Mattress protectors? Every two months says Google. I don’t have the energy for any of that. So I did a little canvas of family and friends, most of whom said ‘I’ve never washed mine’ or ‘not for years’ or ‘ev...