Cover the inside of the pot with baking soda.
Pour 2 cups of white vinegar into the pot.
Boil the mixture on your stove for five minutes.
Pour out the contents.
Wash the pot using a nylon cleaning pad and hot, soapy water. The vinegar and baking soda will have dissolved most of the residue from the burnt soup.
Rinse and dry the pot.
Fill the pot with 1 quart of water.
Stir 2 tablespoons of cream of tartar into the water inside the pot.
Boil the mixture for approximately 10 minutes.
Pour out the mixture, and wash the pot using a nylon cleaning pad along with soap and water.
Rinse and dry the pot.
Pour liquid fabric softener into the pot. Use enough to completely cover the burnt residue.
Wait for approximately one hour.
Wash off the stains with the nylon cleaning pad, soap and water.
Rinse and dry the pot.