I'm sorry that I don't have much info on the care of our privacy curtains.
I can report that they are likely: "91 x 46 privacy curtains w tiebacks", color: Delmar Almond
by:
Decorator Industries
1614 Eisenhower Dr, N
Goshen, IN 46526
Phone: 574-533-8641
Their website,
http://www.decoratorindustries.com remains unfinished, ie: "coming soon".
My guess is that you can contact them by phone, explain that your curtains are used on a GulfStream motor home, and they will be able at least to advise how to care for their product