If your nice, clean, fresh sheets are struggling to hide the sweat & tears endured and remembered by your mattress, duvet & pillows, then for them, you’re on the right page.
Chances are – that though you’d like them clean and fresh too, they just won’t fit in the washing machine or tumble drier. Experts (actually, we don’t know anyone with a PhD in mattress testing either, but the healthcare people are in accord) recommend that duvets & pillows are cleaned at least every six months.