Re: it looked like my foil had vaporized
well its foil which has a connection of Alzheimers. The fine particles get a lot of energy from the heat, enough to start breaking free of bonds and are getting sucked downward.
Some are hitting the tobacco and not moving on, some are getting cooled by the water and not moving on, and some are just settling in the hose.
What actually gets to you, I don't know. The pocket foil method makes it easier to happen I guess.