#1. Put the pan into a bond fire until it burns off. Then whip down with shortening and it is ready to be used again.
#2. Rub down the pan with solid shortening and place into a paper bag. Then put it into a closet for two months. Then whip clean.
#3. Rub down the pan with solid shortening and put the pan into the oven at 250 degrees and bake for 15 to 20 hours. Then wipe clean.
Let us know if you try one, or have a different way to clean your cast-iron pans.