Instructions:

1. Prepare the oven:  Remove any large debris or food particles from the oven.
2. Create the paste:  Mix half a cup of baking soda with a few tablespoons of water to create a spreadable paste.
3. Apply the paste:  Spread the paste on the interior surfaces of the oven, avoiding heating the elements. Let it sit overnight (at least 12 hours) for best results.
4. Wipe:  After leaving overnight, use a damp cloth to wipe off as much of the baking soda paste as possible.
5. Vinegar Spray:  Pour vinegar into a spray bottle and spray the inside of the oven, especially in areas where baking soda residue remains. The vinegar will react with the baking soda, foaming and loosening any remaining dirt.
6. Final Wipe:  Once the foam has subsided, wipe the oven again with a damp cloth to remove any remaining baking soda and vinegar.
7. Optional step:  For stubborn stains, repeat the process or use a sponge for a gentle scrub.