Dry promptly and thoroughly with a lint-free cloth or paper towel; Rub with a very light layer of vegetable oil, preferably while the cookware is still warm; Hang or store cookware in a dry place … has no leftover food residue, but continues to blacken the drying towels used. This is NOT normal behaviour for cast iron cookware! I’ve just …
https://www.amazon.com/Lodge-Pre-Seasoned-Classic-7-Quart-Cooking/dp/B000SOM5XS