Thanks @UnevenPizza and agree with your points on voltage and yes I too use an ugly wall converter! That's got to be a pretty large variable that I forgot about. You are clever! @ataxian You don't sound like a know-it-all on FC; You sound like Bender! You're the best, my man. @baxter are you referring to condensate inside the Nano dry stem? That's not weed dust, that's cooling vapors on the glass stem before it gets to your mouth. I use hemp fibre on a bamboo skewer to wipe it up then vape that fibre. It's taste is good and effects are potent! Others soak a stem in creamy cocoa. IMO, limited though it is, different varieties do produce different condensate. If you've been vaping schwag, with small amounts of trichs & other goodies then the production of condensate would be lower than other better varieties (strains) IMO. Vaping crappy weed leaves little extra behind; Kind bud will leave lots more behind in the form of golden vapor condensate. Look at the close-up picture here by @vtac My stems look like this in about a week depending on usage (obviously). Apologies if this isn't what you meant @baxter my friend I just get excited when I think I have something to contribute!