In my job I'm forced to touch and shake hands with some really nasty people. I sometimes play my Poly G to entertain the babies and little kids. I realize that I must be transferring all kinds of bubonic plague and ebola and AIDS and stuff onto My Precious and near/into my mouth!
I realize that you were trying to be funny with your expectations of what terrible things you might be transferring to you oc, but AIDS (more specifically HIV) can NOT be transmitted through hand shaking. Remember that those "nasty" people are still people too. Show them some basic compassion.
This just seems plainly obvious to me, but instead of worrying about how to disinfect your oc, why don't you just wash your hands or use an alcohol based sanitizer before you play so you're not contacting your Precious with as many microorganisms? It's just basic universal precautions and no one has to test the durability of the glue in vinegar baths.
Although for some infectious materials, the hand sanitizer doesn't work so handwashing might be preferable.