Oh please, I posted once about possibly dropping my scarf in human waste and then wearing it. Talk about embarrassing AND repulsive. This is nothing :p
Anything you put in an area where air doesn't circulate can potentially get a stale, musty smell in my experience. No big deal. I'd probably just toss it in the dryer for a few minutes with a dryer sheet. If that doesn't work, just wash them. Or Febreze? Febreze has that "Febreze" smell to it though...
I am awful and lazy with laundry, as I am with all domestic tasks. I just toss everything at once in the washer, put it on cold water and a reduced spin, and let it go. I do not separate clothes except for bras and hosiery. Even that I used to just wash with the rest of my clothes until Intimacy scolded me.
I do hang dry most of my stuff or just let it dry flat on the carpet though, but sometimes I let it sit there for days until all the little wrinkles and bumps are fixed into place, and of course I also NEVER iron, even when I know I should. I just hate doing it, and I'm no good at it.