Hello gentlemen!
With all the drama with the Volcano Hybrid I checked the chamber of my pre-Canopy Plenty and I had the same issue. A lot of residue worth of years of usage came out when I wiped the metal ring. I did stop using this unit a year and half ago because it gave my throat severe irritation. At first I assumed it was because of the massive amount of vapors inhaled but now i am scared it could have been caused by alluminium dust. What scares me the most is that the heating element itself is alluminum too and it may be releasing this dust infinitely even if the coupling issue gets resolved.
I saw someone in reddit with that same dust in a Vapcap and a Flowerpot. I have done the q-tip test in both of them and I saw no residue. Could it be dust or combustion residue in that particular case?. Tested Milaana, Haze square and Argo. No residue at all. I also did that test with my Stempod and a very very little amount came in. I think it could be ash caused by the tiny amounts of herb that could get there but further investigation should be made. The other vape that worried me was my Flipbrick. I saw TONS of residue in the flame intake but it can be caused by a low quality butane (i use butsir, it says filtered 11x but who knows) so I wont be using it at least until someone with better knowledge analizes direct flame butane devices.
Don´t take this post as a statement as these are my personal thoughts and they have not been scientifically tested, just a guy some q-tips and 10 minutes of research. I am sure you guys will get to the bottom of this situation and I am willing to help!
The truth is out there