How do you get the wrinkles out of a raincoat?

My daughter has a raincoat that has been packed away. How do you get the wrinkles out? (obviously you can't iron it - it would melt!) Has anyone heard any tricks on how to make it look like new again?How do you get the wrinkles out of a raincoat?
Sure put the dryer on delicate and put it in for 4 or 5 minutes...How do you get the wrinkles out of a raincoat?
hand wash it in the bathroom with really hot water (use rubber gloves) then hang it to dry on a coat hanger brushing it straight with your hands; you could also turn on the bathroom heater and if still more work is required use a hair dryer but be careful as it can get too hot ; brush coat with naked hand so that you can feel the heat and adjust the settings ; you could let your daughter help so that she learns how it is done------ perhaps you could try the hair dryer first as the coat may not need washing
I would put it on ';fluff'; in the dryer, or if your iron has a steam setting, just put it on steam and move it around over the rain coat with out touching it. Also, you might try the Downey Wrinkle Release spray.
sit on it!
Hang it in the bathroom and run the HOT shower, Weight the bottom of the coat a bit--