Minnflyer is right. You'll just need to work with it to get it right. There is not much more info to give you. I think a hands on approach may be the best way for you to get this right. A heat gun would work best in this situation, but if an iron is all that you have, twist it as Minnflyer said and work the wrinkles out with the iron.

Best of luck to you. You'll get it.