I've had some pretty bad luck vaping lately. I just got a newish vape tank and a battery today from a friend, and it was empty, but he said he had mint in it when he last used it (Because he got the juice for free), and I filled the tank with my grape juice. I can definitely identify the mint, the only problem is I can't tell if the mint is suppose to taste so potent and like poison, or if there is something wrong with the tank, it seems in pretty good shape.