Over the last week or so, I've been pre-washing and pressing fabrics. Remember this stack?
Do you pre-wash your fabrics? I usually don't unless I know that the item being made is going to be thrown in the wash. Blankets and bibs? Definitely going into the wash. The first time I ever did a pre-wash, holy smokes did my fabric get all frayed and there were strings all over the place. Now, I take the time to straight stitch each raw edge. Just a quick stitch very close to the edge. That doesn't prevent all the fraying, but I find that I don't get a ton of strings anymore. So give that a try and see if it works for you!