A while back we got new lockers at work. Everyone very happy. But over time I started to notice a truly fetid smell whenever I used my locker. I couldn't fathom it to begin with. It's so bad like heavily rotted food. The lockers all have vents & when I sniffed the vent of the locker below.. 😵Something evil is being stored in there. Perhaps very sweaty shoes? It turns out it belongs to a young female. How can I nicely ask her to do something about it without causing embarrasment?