Zero-Gee Gremlins
Taking into account a zero gee (micro-gravity) enclosed environment with a volume equivalent to a small house, it's a wonder more stuff doesn't get lost.
It seems like loose objects, would have a lot more surface area, and nooks and crannies to wander into and hide, than in my home, where even though gravity is on my side, I still lose crap all the time.
Just another example of learning how to adapt to space.