Esteemed Contributor
Posts: 6,788
Registered: ‎08-18-2016
Wash ALONE in a clean machine in cool/cold water, NO fabric softner.
Hang dry or machine tumble a few minutes on Air Fluff, NO heat, NO fabric softner dryer sheets.

If you wash it with other stuff it will become covered with a zillion ugly little lint 'pills'.
Heat and/or fabric softner will make the fluffy, soft, warm fibers clump together and go flat. No more fluffy. No more soft. No more warm.