Cleaning
Preheat your oven to 200°F to warm it up. Turn off the oven and remove the grills. Soak the grills in soapy water. Spray areas with burnt on food with oven cleaner and let it sit half an hour or over night. Scrub the grills with a wire brush or scrubber while you wait. Wipe away oven cleaner and dirt from the surface of the oven with a sponge or rag. Scrub any stubborn stains and wipe surface clean. Put the grills back in and lay down an aluminum foil at the base for easier cleanup next time.