Wipe up any food debris or spills with a damp sponge or paper towels just as soon as the ovens cools down. Acting quickly often prevents discolorations or staining on the interior.
Mix a thick paste of baking soda and water to clean any discolorations left from the spill. Baking soda is non-abrasive and does not scratch the oven interior.
Wet a sponge under hot water and wring it out so that it doesn't drip.
Dip the sponge into the baking soda paste and scrub the discoloration in a circular motion until it is gone.
Rinse the sponge thoroughly. Mix equal parts of white distilled vinegar and water in a small bowl and dip the sponge in it. Squeeze the sponge out to prevent dripping.
Wipe the interior of the oven with the sponge over the previously discolored area to rinse it.
Run the self-cleaning cycle if the oven is heavily soiled or the discoloration does not diminish. Sweep the ashes out with a small hand broom and repeat the baking soda method if necessary.