If your oven is dirty and you don’t have a bottle of oven cleaner on hand, or simply prefer an entirely natural solution, try using a combination of vinegar and baking soda. Sean Parry of Neat Services suggests mixing one-half cup of baking soda with water to create a paste. “Next, spread the paste all over the bottom of the oven, the side walls, and the inside of the glass oven door, but avoid the heating elements,” he says.
Leave the mixture on for a minimum of two hours, but note it's also a great way to clean an oven overnight. Then take a spray bottle, fill it half with water and half with white vinegar and spray it all over the baking soda. “The acid in the vinegar will then react with the baking soda, causing it to foam. This action helps to remove the burnt-on food stains from the oven,” he says.
After leaving that on for another 30 minutes, use a rubber spatula (if necessary) and rag to remove the baking soda mixture. Finish by wiping everything down with a damp cloth.