<human>:  How do you clean oven racks?
<bot>: The first step is to remove as much debris as possible with a damp cloth. Then, prepare a mixture of equal parts baking soda and warm water, and apply it to the oven racks. Allow the mixture to sit for an hour or so, then scrub the racks with a sponge or a brush. Wash them off with warm water and a cloth, and they should be clean!