Empty everything out of the oven, including racks, thermometers, etc.
Pour the liquid soap into a bowl with hot water and wipe the oven down.
In a medium-sized bowl, mix all the remaining ingredients to make a paste.
Spread the paste all over the inside of the oven except on the heating elements.
Let it sit for at least 4 hours; the longer you let it sit, the more it can work. You can even leave it on overnight, and it won’t hurt anything.
Remove the paste with a rag, brush, or scrub sponge.
You can do a final rinse with a mixture of ⅓ vinegar and ⅔ water in a spray bottle.
