As most everyone has suggested, use tennis balls in the dryer (at least three). I have expensive down pillows on my bed (4) and wash them at least at three months - sometimes more. The cheap pillows (2 for 7.00 at Garden Ridge) will also come out lumpy if you don't use tennis balls. The tennis balls work wonders with regular comforters and my down comforter in the dryer. Another suggestion is to fold cheap pillows in half and wrap with one of those monster sized rubber bands and dry on low but for a longer time period. This keeps the filling from shifting (trick I learned from working at a laundromat when I was a kid). Good luck!