Luxurious and warm, down comforters typically are filled with the feathers of older waterfowl like ducks. So, as a pure filling, down comforters require special care in regards to cleaning and drying them. You can line-dry or machine-dry such comforters. Irrespective of the method you use, ensure your comforter is completely dry to prevent the development of mould, which may ruin it.
Set the drier to the lowest setting — or do not use heat at all — and let your down quilt fall for three or more hours, advises American Drive In Cleaners. You also might consider adding clean tennis balls or athletic shoes into the drier. This assists your comforter maintain its fluffy appearance and keeps the down from clumping.