I pre-wash everything. I don't like the "smell" fabrics have. I treat just like regular laundry, and dry in the dryer. I take out of dryer, and fold. I iron when needed. I have a friend who gives me a lot of fabric from her massive stash, which has all been pre-washed, and I re wash that. Se has a cat, and a dog, and DH is allergic so it all gets washed.