I've used the Blitzen for a week now and had major leaking thru the airflow when refilling my tank. After trial and error I realised that the white o rings work best for vacuum issues and never fill the tank dropping the juice directly into the juice slots... This is a major cause of leaking and...
Rene
Remember less is more and be sure to thin out your wick ends.don't block the wicking ports with cotton..stick your tweezer in there to leave some space.