Hi,
I have made several tater bags using cotton fabric, warm and natural cotton batting and cotton thread....no issues with usage.
I recently bought the new tater batting, haven't used mine yet. A friend made hers with the new batting, and had a fire in her microwave and she did everything cotton.
So, now am in a quandry as to why??? And do I want to use the new batting or why did hers catch on fire?
I don't have a newer microwave, but others who have used the bags I made do, and no fires.
I will keep checking to see what others say on this post.
I do use mine all the time and love how the potatoes cook in it....yum! I also embroidered on mine and used rayon thread, no issue.
I was told to wash your potato, wrap in a paper towel, don't prick it, and cook it. I don't wrap it in a wet towel.
Bev