HI, I am a few months into
vaping. At first I only had a few cartos, washing and re-using was important to me. I did the white vinegar, multiple boilings, etc. What I have been doing recently is using 97% alcohol using
Cartomizerfillinator. It's just basically cutting the end from a condom, and attatching it to a syringe.
I am in the Midwest USA, it has been very hot and humid in the last few weeks. Even with air conditioning in my house, a water-soaked carto is difficult to get dry before it molds. Inhaling mold is not a good thing. If you use dry-firing it to dry the filling, you are surely risking burning it. An oven on warm works well, but it takes a few hours, and I don't want the extra heat in my house right now. Lining up water-soaked cartos with a computer PC fan should be good, it is warm air. If you've ever looked inside of a PC, lots of those can be very dirty as well.
I have been using the syringe, large ones for cleaning, it gives a good power wash to everything inside. I can clean my gunkiest clear dual-
coils, and have them back to bright white in 30 seconds. The alcohol won't mold, and it evaporates faster than water. The flavorings can leave a lot of sediment, change the alcohol as it gets dark. It's also nice to load up a week's worth of cartos in five minutes, totally soaked.
They are cheap. I have been settling into a schedule of cleaning them once, then tossing them.
Hope this helps~