I don't do anything with my Quilter's Dream battings, but I do wash and dry my Hobbs 80/20 before I use it. And one time I got a fusible 80/20 by mistake - I learned I should have washed that one twice! The first time took out some of the fusible (which is what I had hoped), but it didn't shrink it as much as usual. When I used it in a quilt, it shrunk even more the first time I used it and I was very unhappy with the finished quilt.