One way to clean glass oven doors is to use baking soda paste. This works well for mild stains and is safe for the glass. You can apply it to the glass door with a sponge, rag, or wooden spoon and let it sit for around twenty to thirty minutes. After that, wipe off the paste with a wet paper towel and then wipe off with a dry rag. Using a damp rag, rub the paste away from the glass.