DIY Oven Cleaner
If you don't have a self-cleaning oven (which burns off residue at very high temperatures), try this eco-friendly solution.
Source: Healthy Home 2008, Spring 2008
Mix a paste of baking soda and water. Coat the oven surfaces with the paste (avoiding bare metal and heating elements), let stand overnight.
While wearing gloves, use a plastic spatula to remove the paste. Wipe away any remaining residue with a clean, wet sponge.