Hi,
I haven't had to much trouble with JoAnn's flannel but I only buy the kind that says not suitable for children's sleepwear. The other kind has polyster in it and that is why it pills. I had a commission for a baby quilt for a friend of my daughter. I asked the employees at JoAnn's why the supposedly child safe flannel said only "fire resistant". It was not guarenteed safe. They only knew that it would take longer to burn. The stuff with poly in it would probably melt which might burn worse than the cotton as it would stick to the skin.
I have had the same problem with sheets that are part poly. My step-son wanted Pack Man sheets back when they were real popular. After I went to the trouble to get him a set he stopped using them after a couple of washings. They got nasty pills on them that actually irritated his skin.
We live and learn.
mpspeedy