Step 1
Set the glass cookware aside to cool. Exposing hot glass to a change in temperature such as cold water and hot or cold surfaces can cause it to shatter.
Step 2
Fill your sink with dish detergent and warm water. Soak the glass baking dish for at least one hour. Scrape stuck-on food off with an oven razor scraper. Scrub the baking dish with a nylon scrubbing pad to remove burnt food remnants and to eliminate scorch marks. Rinse the pan.
Step 3
Pour 1 quart of water into a bowl. Add 4 tablespoons of baking soda. Stir the mixture until a paste forms. Dip a nylon sponge in the paste. Rub the paste onto the scorched cookware in a circular motion. Allow the baking soda to rest on the glass cookware for 20 minutes. Scrub and rinse the paste off with the nylon pad.
Step 4
Pour oven cleaner on the burnt surfaces of the glass cookware, if discoloration still occurs. Place the cookware in a plastic garbage bag and tie the bag shut for 24 hours. Remove the cookware and wash it with soapy water and a soft sponge. The oven cleaner contains chemical degreasers that break down the carbon residue left on scorched glass.