Originally Posted by deedum
I have only used rice, becareful not to over heat them in the microwave because they can burn. You have to work at it, I have only done it once. I haven't tried flax seed. Field corn holds the heat best and the longest. However, I think it is very attractive to bugs, rodents. So I just stick with rice. I like fleece when making rice bags, so nice and soft.
I also used corn in mine. I made gobs of them last year for gifts. When each was done I put them in the microwave for
several minutes to kill 'anything' that was in there. Before that
we had some given to us...they've also been in the microwave
and never had a problem.