Some of the toughest stuff to clean in the kitchen is all the baked-on grime inside your oven. Instead of reaching for chemical oven cleaner, try this all-natural alternative instead. Mix baking soda with some water until you get a pastelike consistency. Spread the mixture all over the inside of the oven. Wait at least 12 hours, then fill a spray bottle with white vinegar and liberally spray the inside. The baking soda and vinegar together will cause a foaming reaction, which will bubble away the baked-on mess. Wipe and rinse with a little water, and voila! Clean oven.