I had a badly wrinkled Whisper Knit sweater (it came that way in the plastic bag from QVC). I tried using my steamer (Rowenta), but either I wasn't using it properly or it didn't work right. Anyway, I asked about this on the forum awhile back, and it was suggested that I lightly steam the sweater. I did that, and all the wrinkles came out beautifully. When I carefully fold my sweaters, hang them over a hanger or roll them, they don't get wrinkled. If there is a bit of wrinkling, I just smooth the sweater out with my hand.