Rinse out the pot under warm running water to remove as much loose food and debris as possible.
Pour one can of cola into the pot and place it on the stove.
Turn on the heat to “high” and bring the cola to a boil before reducing the temperature to "medium" and allowing it to simmer for 20 to 30 minutes.
Turn off the heat and allow the cola to remain in the pot for 15 to 20 minutes.
Rinse out the cola with warm water and scrub the stains with a piece of crumpled up aluminum foil to remove the remaining stain.
Wash the pot with warm soapy water and rinse it out well.
Dry the pot with a towel and inspect it for any traces of the stain. Repeat the process if any burnt stain is still present.