Always figured weird camera smells were just old grease or something. Then I opened up an old lens and found actual mold growing inside. That sour, cheesy smell is exactly what fungus on glass or foam can smell like. You might want to check for little fuzzy spots, it's pretty common in old gear stored in damp places.

Set a kitchen timer for each kid's turn, works every time.

Sounds a bit romanticized now, doesn't it?