I'm trying to remember. I was so young... Like I said, my grandma cooked a lot. My aunt had a self-cleaning oven and I remember my grandma (we used to call her Meme) and she would say "this is not a self-clean it's a continuous clean... I remember thinking "what's the difference" She didn't know....but I remember looking in the oven and the worst it ever looked over the years was that it sort of looking like it could use a vacuuming out from maybe a few crumbs here and there...but it never looked deteriorated or stained and she had that thing for years...In other words, if you ran a vacuum cleaner to get the crumbs out, it would have looked new