(ran NP edition)
When you have a dirty frying pan, try this cleaning method.
Place the pan or skillet upside down inside a plastic garbage bag. Pour ammonia onto the back of the pan, but avoid getting ammonia on the cooking surface side. Lay an absorbent cloth over the ammonia and add more ammonia until the rag is saturated. Close the plastic bag, making an airtight seal. Let the pan soak overnight, or for at least eight hours. Remove the pan from the bag and rinse it off in hot water. Use a steel wool scrubbing pad to eliminate extra-tough spots.