WOW. You probably know this but...when you prewash make sure that you don't put different colors together. I made the mistake of washing two smaller pieces together just to fill up the machine. I ended up going back and getting more flannel as I couldn't get the lint from the neon green off the blue. I will use a lint roller but it will take a lot of time. Learn something new every day. Have fun with all your fabric. I love to back my quilts with flannel. BrendaK