I have been cooking with my two cast iron pans for quite some time now. Tracking the occurrence of when my wife and I have tummy trouble leads me to believe that my seasoning of the pans is not optimal.
The reason is most likely because I don't always season them the night of cooking (I will do it the next day). When I thought that this might be the issue I did an intensive seasoning. Normal seasoning is: brush with hot water, warm on range with layer of oil. For the intensive seasoning I will put a layer of tinfoil on the bottom rack, and place my pans upside-down on the top rack, then heat the pans at 400° for 45 minutes.
I believe the intensive seasoning does kill any germs that might be there otherwise. Should I have to do this every time?
Best Answer
Seasoning pans is a method for preventing rust, and it has nothihng to do with food safety. It is done once in a pan's lifetime, and only repaired if it flakes off.
There is no prescription in food safety to cook in sterilized vessels. The germs you eat come from the food, not from the pans. Even if a colony were to form in the pan at some point (what would it eat in a clean pan?) it would be killed in the same cooking process that kills the colonies that live in the raw food.
Nobody but your doctor can tell if your tummyache is indeed caused by food poisoning or something else. So, if you have symptoms, go get yourself checked.
If you really have recurring food poisoning (and not some unrelated illness), you must be hurting standard food safety practices in rather blatant ways. Normally, breaking does rules only rarely results in actual symptomatic illness. You can read our short primer on food safety, including the questions linked from it, to see if you are breakding any of the rules explained there: https://cooking.stackexchange.com/tags/food-safety/info. The pans are not related at all.