Hmmm... Did I Forget Anything?

Favorite
bathroom,signs,wash your hands
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The only way to be more obvious is to hire a burly strongman (or -woman) to tackle you and rub your face with hand sanitizer before you leave the room.

Well, Yes, That's the Other Reason

Favorite
hygiene,infection,poo,poop,smell,wash your hands
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If the smell was strong enough, management could go around sniffing people's keyboards and giving mandatory hygiene seminars to the ones whose keyboards smelled like poo.