I have a heavy duty floormodel steamer with ajustable pressure and multiple nozzles from single to wide enough to clean windows with. Works wonders, money very well spent. I use it to clean tiles outside, blankets, even leather couches. Gets stains out of clothing like jeans without effort. Yes I use it for clothing and other fabrics as well. Most important note is, do not get (subject) too wet or it won't work anymore and dry up ugly.

Might try and see if it will get the wrongly pressed last pleat realigned..