So I've been pretty lazy with my refilling, basically just topping off daily... I decided to try shaking one up like taryn's refill method and getting as much juice in it as possible, using 36mg Marlboro PG... the first few hits were wispy and weak, as I'm sure I flooded it a bit... but shortly thereafter, I've been getting thick vapor and an INTENSE throat hit - quite possibly the BEST vape I've had so far, beating out even my 510 at 6v... I'm shaking them all up from now on 