A few months ago I argued with a friend about how long it'd take to (thoroughly) clean an oven, and after cleaning the oven whether or not you could restore it to the level of cleanliness it had been in when it was bought.
We argued for about an hour mainly about this point, mostly because we are both very stubborn. I'd maintain that it would take a very long time for one person to clean an oven with only the types of cleaning materials that are available to the average member of the public.
