One of the worst jobs in the kitchen has got to be cleaning the oven, especially when there is an accumulation of spills.
Mix 1/2 cup salt, 1/4 cup borax, 1/2 baking soda and then add enough warm water to make a paste. Apply liberally to the inside walls of the oven and leave for at least an hour. Wipe down with a clean cloth wrung out with white vinegar (and lemon essential oil for that fresh smell if you wish), then wipe down once more with a clean, damp cloth.
The results are rewarding.