vaping.. When I first started a 1.6ml tank in a stardust lasted me 3 days, thats 1 hour now or less.. It is expensive but they in my review of them are almost guaranteed to work for the stubbornest analog smoker that gives it a try..
I have tried just about every disposable and the NJOy's have that area --expensive @ expert conversion.. If disposables and carts etc etc wont work I think these will.