I have a comforter that I wash on hot because we were told that my son is allergic to dust mites. So I washed it and all the stuffing has bunched up in little wads and it bothers me. My sister suggested I do a duvet cover instead but I always feel like the duvet slips and bunches to one side. Has anyone had any luck with a nice duvet filling that doesn’t bunch and washed well when needed? Down is really expensive, right? My husband prefers comforters to quilts.