toobfreak
Tungsten/Glass Member
I've only had one go rancid on me and they smell rank when it happens.
If that happens, you are not seasoning properly. You need to remove the seasoning and redo it. Maybe the oil you used was rancid itself, not cleaned well, or maybe you used the wrong oil. Properly seasoned cast iron, the seasoning actually becomes CARBONIZED into the iron through a process of polymerization.
WHAT I RECOMMEND:
- Start with a new, clean skillet (even if it comes preseasoned) or remove all old seasoning.
- Washing the skillet well.
- Set over racks two apart in center with aluminum foil on the lower rack.
- Dry skillet in oven at 200° for 20 minutes to assure iron is dry to the molecular level. Let cool just enough that you can handle it. This opens the iron.
- Coat the skillet all over inside and out with grapeseed oil. This is cheap and a good thing to have in the kitchen anyway. Wipe it down lightly with a paper towel to assure the coating is thin.
- Place on top rack upside down and bake at 400° for an hour.
- Take out, let cool a bit, repeat two more times.
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