This video shows how to care for your cast iron pan. The guy explaining made some chicken the night before and was to tired to clean the pan. He says never to use soap on cast iron. Run some hot water over the debris that was left in the pan. He uses a scrub brush to get into the edges. Take some salt and pour it on, it's alright to put a lot on. Rub the salt around and rinse it out. Use a towel and wipe it dry. Then put it on the stove with medium high heat for five minutes. Every so often it's important to use vegetable oil to season the pan.