Serious question, what's the weirdest thing you've found jammed in a hoistway door track?
I pulled a kid's action figure, a full bag of marbles, and a single flip-flop from a track in a Phoenix apartment building last Tuesday, which finally explained the intermittent door faults we'd been chasing for a month.
Honestly that sounds more like a science experiment than a sandwich. Once food gets to the petrified stage, the smell is usually pretty obvious right away. Maybe you guys just had really bad colds?