Fill a small cooking pot with 2 tablespoons of baking soda, 1/2 cup of white vinegar and 1 cup of water. Bring the mixture to a boil.
Place the cake pans on hot pads to protect your countertop. Carefully pour the heated vinegar and baking soda solution into the cake pans. Allow the solution to remain inside the cake pans until it's lukewarm
Scrub the inside of the cake pans with a nylon mesh scrubber to remove the loosened grease stains without scratching the Teflon coating. Sprinkle baking soda onto the scrubber, if needed, for stubborn grease stains.
Empty the vinegar solution out of the cake pans. Place one or two drops of dishwashing detergent in each pan. Add water to cover the bottom of the pan.
Wash the inside of the Teflon cake pans with the detergent and scrub brush. Rinse the pans with water to remove the detergent.
Dry the Teflon cake pans with a lint-free kitchen towel.