If you must use soap of any kind, please remember that it is deadly to aquatic life--even the "biodegradable" camp stuff. Please dispose of it at least 200 feet from any water source, including seasonal sources.

Boiling water in the offending pan will get rid of most or all of the grease. A small piece of paper towel used first will help.
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey