If you prepare foods outdoors over an open flame or campfire, you should clean the cookware after each use, or soot can build up on it over time. Avoid trying to crape off the soot with a knife because sharp objects can quickly scratch your cookware. Instead, you can use a cleaning technique that removes soot without scratching your cookware.
Scrub the soot with a dry nylon scrubbing pad to scrape off the excess.
Fill the sink with about 2 gallons of hot water, 2 tablespoons dish soap and 1/4 cup baking soda.
Soak the cookware in the soapy water for 5 minutes, then scrub it with a nylon scrubbing sponge.
Rinse the pot, and check for any leftover soot.
Heat a mixture of equal parts white vinegar and water in a larger pot, if soot remains.
Place the cookware in the pot and allow it to boil for 5 minutes.
Rinse the cookware with warm water and scrub again with the nylon scrubbing sponge. Rinse the pot with warm water after cleaning.
To prevent soot buildup in the future, try coating the outside of your pots with a thin layer of bar soap or dish soap.