Soak the pan in warm, soapy water for 30 minutes to loosen any remaining food residue on the surface. Wipe the food out with a mildly abrasive sponge and rinse the pan with clear water.
Fill the pan with 1 quart of water. Mix 2 tablespoons of lemon juice in with the water. Use additional water and lemon juice, if necessary, to submerge the burn marks in the water.
Bring the water to a boil over medium-high heat. Allow the water to boil for five to 10 minutes.
Empty the hot water from the pan. Wash it a second time in warm, soapy water to remove the remaining scorch and burn marks.