20, for over a decade. However, in the last six months I found a carpet beetle larvae on my duvet so since then it's been what I'd imagine to be 0; thick hoodie, sweatpants, socks, no duvet. I hate bugs. I can't understand where the larvae came from. I have found maybe two a week since then in my carpets but it doesn't seem to be a big infestation? None of my clothes or fabrics have holes in them. I've washed everything and hoovered like a madman. They don't seem to be infesting anything in my apartment. I think they must live in the floorboards or something. God I hate bugs.