I used insult bright in my tater bags! I have used them a lot and given away a bunch including yesterday as Christmas gifts! I have never had any problems but never cook longer than 4-5 minutes at a time! I give instructions to bake with mine. I am a bit Leary now but as I said I have cooked with them almost a year. They make great sweet potatoes and warm tortillas quite nicely. ..?????? Food for thought this thread is!!!!