I would do a load of laundry and wash a standard towel. Put the towel in with the quilt and fluff for a bit, probably at least 15 minutes. This sounds basic but when you put the quilt in the dryer it should be sort of jammed in there and then the towel should be "snapped" out of the washer and put in loosely, not a big lump.
I haven't tried my woolen drier balls yet, I might throw them in too but like I said -- I haven't tried it yet.