Alright so usually what I have been doing is mouth inhale, breathe into my lungs, then exhale because if I lung inhale just like a cigarette it's way too overwhelming with the rough throat burn and caugh. What I have found that helps and is actually helping me get more comfortable and isn't so rough on the throat is French inhaling. But no matter what way I do it when I inhale to the lungs I get no vapor. I don't know exactly what percent the mixture is, when I ordered it I just chose PG. I went back and looked and there are more options for different mixtures with the percentages. So maybe i just chose straight PG? What would be a good mixture? As for the nicotine content I chose the lowest dosage which was either 6mg or 10mg.