It is a common problem with comforters, blankets and quilts. You buy a new covering for the bed and after some use, clumps and lumps of batting start to build up. Not only is it unsightly, but lumps of batting mean some parts of the bed covering do not provide as much warmth. The good news is there is a super easy and simple fix for lumpy batting; tennis balls.
Visit your local sporting goods or mass retail store.
Buy one to two packs of tennis balls. Tennis balls normally come in small packs of three, four or six balls. Use at least two tennis balls for fluffing batting, because one tennis ball against an entire comforter or quilt is not very effective. Experiment with the number of tennis balls you use in one drying cycle. Some people find that more tennis balls means more fluffing action.
Wash the item with the lumpy batting as you normally would in your washing machine.
Put the washed item into the dryer.
Throw the tennis balls into the dryer.
Dry your item as normal.
Take the item and tennis balls out of the dryer promptly at the end of the dryer cycle.
Hold one side of the item and fluff it outwards onto the bed to prevent wrinkling and lumps.