So instead, try this nontoxic oven-cleaning trick. Stir baking soda and water together until you've formed a paste. Then coat the inside of your oven with the gooey mixture, and let it sit overnight. The next day, simply scour away the paste. To get your oven looking picture-perfect, spray a cloth with a little bit of all-purpose eco cleaner, wipe down, and call it a day.