There seems be no research study about what happens to air-path walls when you push cannabis vapor through it for multiple times and during various time intervals(hours, days) without cleaning it.
I think we would be surprised what we are actually breathing in addition to usual cannabis vapor because we may not be cleaning our air-paths often enough
It sounds crazy but I think cleaning whole air-path with ISO after every session(including glass, or replacing bag) would be very beneficial for our health but doing it manually would be very tedious.
I am wondering if UV light sterilization could help
If you're referring to air paths in the vaporizers, it's more difficult to solve, but if you mean in our glass pieces, like you said, ISO washes each use would be ideal, but there are ways to keep your pieces cleaner for longer. Cranberry extract (a few drops in the water) shaken to wet the entire inside surface of the glass, will largely prevent the vapor from condensing, and hot water rinses will be enough to make your piece shiny. Storing your piece dry would also help. You could just do the hot water rinse after each session, and then store it empty. That would likely be your best bet, if you don't want to use ISO each time.
my draw tube is a 6" long glass tube. one rolled up full size paper towel swabs it out perfectly clean. completely satisfying my compulsive cleanliness issues. very nice to vape through crystal clear glass. kind of like washing the coffee pot every day before my morning joe.
I'll only vape through glass that's been cleaned the same day, usually right before the session. I clean with just a hot water rinse, but also use cranberry extract, which keeps it sparkling clean. Running hot water through it for 15-30 seconds seems to get it almost perfectly cleaned in between ISO rinses, every few days.
I doubt there are many bacteria forming in the E-Nano air path.
The GonG and Screen get cleaned before every session. in an ultrasonic cleaner filled with water and ISO (you're not technically supposed to use ISO because it can vaporize and ignite if there is a spark or open flame).
Torching the screen before this, helps speed it along and keeps the ultrasonic cleaner's reservoir cleaner for longer, but I have recently been wondering if the heating of the screen makes it release any chemicals. I don't want metal vapors or particles in my vapor. I honestly, don't think it's much of a problem, but I want to find out for sure.