The discolored baking sheets and pans may be easily remedied by liberally dusting them with baking soda, being sure to concentrate on the corners and severely burned regions. The next step is to deglaze the pan with distilled vinegar. Last but not least, pour in enough boiling water to cover the entire pan, including the edges and any stains.
After an hour of soaking, use a scrub brush to remove any remaining residue or stains from the pan or sheet. All it takes to restore the luster of your cookware is a quick rinse in hot water. You might need to give it another go if the stain is very difficult to remove or if there is a lot of residue stuck on. Enjoy your cleaning!
