Hello, everyone.
Maybe someone can help me.
I decided quite a while ago to sew myself a skirt. I bought the fabric for it some time ago and wanted to prepare it now—that is, wash and iron it. Now I have the problem that the fabric (viscose) is still very wrinkled after ironing.
I’ve tried placing a damp towel on top, re-dampening the fabric, and using different ironing boards—I’ve tried everything—but there are still these little wrinkles all over it. (It looks a little bit like crepe paper.)
Does anyone have any other ideas on how I can get the fabric smooth again?
Here’s a picture. (The fabric is actually blue.)

In the upper left corner, it’s become quite smooth again, but everywhere else, there are those little creases.