Sorry but in defense of Joann's When I was pregnant with my youngest son I bought YARDS AND YARDS of snuggle flannel to make larger receiving blankets with since you can't buy a blanket big enough to swaddle a baby in. These things are 18 months old and have been washed more times than I can even think about. They still look the same way they did the day I made them. All except the fabric isn't as stiff.
I wash in cold dry on HOT. it still gets the shrink job done!