Turn off the oven and let it cool completely
Remove oven racks and any loose debris
Mix baking soda with water to form a spreadable paste
Spread the paste on the oven interior, avoiding heating elements
Leave the paste on overnight or for several hours
Wipe out the paste with a damp cloth
Spray vinegar on any remaining residue
Wipe again with a clean damp cloth
Wash the oven racks with warm soapy water
Scrub stubborn spots with a non-scratch sponge
Dry the racks and return them to the oven
Clean the oven door glass with a suitable cleaner
Wipe the outside of the oven with a damp cloth and mild soap
Run the oven briefly to dry any remaining moisture