I've currently got blu ecigs (joyetech 510t is in the mail!) and three of the carts taste burnt. Is it possible to burn the juice if the atty overheats? Could I be drawing too long and overheating the atty? Would leaving my kit in the car, even for ten or fifteen minutes, burn/kill the taste? Could it be that once the cart is only half emptied the flavor goes away? It's only the menthol and vanilla carts that this happened to. My one remaining tobacco cart seems fine. I'd be surprised if it was poor juice quality, since blu uses Johnson Creek. But then again there's inconsistency in the carts every now and then. I'm basically wondering if it's faulty gear or juice, or if it's my vaping technique that is to blame.