What is the best way to: how to clean cast iron skillet

Select from the following.
(a). Wash cast iron by hand with a steel brillo pad . ... Dry promptly and thoroughly with a lint-free cloth or paper towel. Rub with a very light layer of cooking oil or our Seasoning Spray, preferably while the cookware is still warm.;
(b). Wash cast iron by hand with a nylon bristle scrub brush. ... Dry promptly and thoroughly with a lint-free cloth or paper towel. Rub with a very light layer of cooking oil or our Seasoning Spray, preferably while the cookware is still warm.;
Answer:
(b).