Guess what I just found out...Some orings swell and get larger in diameter if soaked in 50/50 white vinegar/water solution. I have never had this happen before.
I recently bought some second-hand atties from someone who said they were cleaned in an ultrasonic cleaner yet when I received them they were filthy and smelly as he||.

Juices used were coffee and creams and the smell of these juices these nauseates me and are hard to get off even metal.
So anyway, I find that on most parts of attys soaked 50/50 white vinegar/water solution, you can get rid of most eliquid flavor smells if you soak long enough in this solution.
So they've been soaking probably 5-6 days or so. Went to go rinse them today and found 2 of the larger orings on these atties had become enlarged probably about double size. lol I've never had this happen before with orings. (I have had cheap Fasttech orings become distorted if rinsed in tap water that is super hot, though.)
I don't know if it was the water or the vinegar that did this (or both). It happened on only 2 orings. All the other orings are just fine.
Anyhow, thought this was interesting. Not a big deal becuase they are just regular oring and are a dime a dozen. But this would be a problem in a vapocalypse situation with proprietary seals that can no longer be bought and cannot be substituted with orings.
Side note: I don't usually buy used atties, but I went against my policy this one time. Sure enough, the experience confirmed to me why I have a "no used atties" policy and why I will stick to this policy from here on out.