I always thought my Nauties were temperamental. I struggled at first but I seemed to have got it sorted.
Anyway, I found that juice and airflow have to be played with. I like more air, but then I get less juice. I use the 3rd largest air hole. But it still depends on how you do a draw. there has to be some consistency.
Also, I was tightening the atomizer and the tank when putting the bottom back on pretty tight. Someone mentioned that the bottom shouldn't be cranked down, so I am less aggressive when tightening it.
Anyways, temperamental.
Hope helps