Don't want to buy that horrid costly and caustic Oven Cleaner? Don't want to use your self cleaning button because it is an aweful waste of energy? Pour one-half cup of ammonia into a cup and place it inside the oven. Be sure the door is closed tightly. Allow the ammonia to sit overnight, or about 12 hours. Then, wipe the interior of the oven with a rag, some mild dishwashing detergent and hot water. To add sparkle rinse with clear water.
Frugal and crunchy - and it really does work!