I am having a huge problem now because I was taught to always pre-wash! I am getting ready to make a 30's quilt, I had pre washed as I filled my stash. The problem is I want this quilt to crinkle up good and I want to use un-washed fabric! and everyone says u can not mix the washed and unwashed on ur quilt. So my stash is useless and I have had to buy all new 30's stuff.....which is sad cause I had about a 3rd already bought. I will no longer pre wash until time to use the fabric.....and see if I need to or not!!!