Potential buyers love to look inside cabinets in every room, open the dishwasher, open the refrigerator and yes, even your oven. If your oven is clean, put aluminum foil on the bottom. That way if anything spills, it will end up on the foil and you can discard the foil when you are done. You can clean your oven with a mixture of baking soda and white vinegar. Combine five tablespoons of baking soda with four tablespoons of white vinegar. Then add a few drops of liquid dish detergent. Mix it until a paste forms and wipe it inside the oven.