At 9, I got another call – an elderly couple with health issues had an emergency repair. Would between 2-2:30 be okay. Well, a garbage disposal is NOT a health issue. So he showed up at 9:45, and I'd actually cleared the jam and fixed it myself! But, I did not remember it had a "reset" button. He told me where it was, but it was now pushed, so I could not feel it. The thing worked fine, and he tried to tell me where it was so NEXT TIME, the call would be for real. (He's a gray haired man, second or third generation in the founding family of that plumbing company.)
Taking his finger, he marked a spot on the front. "It's straight back from there, and when it jams, it will pop down, and you'll be able to feel it."
I really should put a mark there, sort of an X marks the spot sort of thing, but the unit is black–I can't even think of anything permanent I could mark it with. I'm sure a yellow post it would giggle off. (lightbulb moment) I could rubber band a note to the hexagonal tipped key, as I did remember that. (Trots off to implement it before she forgets.)