Originally Posted by
sewbizgirl
I heard a few years ago that these things can catch on fire. Is that because people didn't use the 100% cotton?
Everything needs to be cotton, including thread. I probably wouldn't use metallic fabric either. I also think there was some confusion with Warm & Natural. The batt is 100% cotton, but many people don't know that it contains a scrim, which is polyester. The other thing is you should only be warming food in the bowl for a minute or two.