Keeping your baking sheets clean isn't just about appearance -- it's about hygiene and performance. Here's how to do it right, with the supplies you probably already have at home.
Mix 3 tablespoons of baking soda with enough hydrogen peroxide to form a thick paste. This combination is the most effective at dissolving baked-on grease.
Spread the paste over the entire surface of the baking sheet, concentrating on the darkest, most discolored areas.
Allow the paste to work for 2-4 hours, or overnight for heavily stained sheets. The peroxide slowly breaks down the carbonized grease.
Scrub with a non-abrasive sponge, rinse with warm water, and dry immediately. Repeat if needed for stubborn stains.