If you’ve pulled out your holiday baking supplies and realize your cookie sheets are grimy and rusty don’t rush out to buy new ones! Instead, fill the sink with hot water, 1/2 cup baking soda, and 1/2 cup  white vinegar. Submerge and soak for half an hour. Then, scrub with a steel wool pad and rinse. The baking soda and vinegar form a bubbly mix that loosens gunk and the vinegar’s acetic acidic acid dissolves the residue. They’ll look as good as new!