So I'm using Ni200, all connections inside seem to be fine. I'm going to try a different atomizer today, I've been using my Kanger SubTank Mini for the past 4 months or so and haven't had any issues with it before. Using the factory made OCC nickel coils, so I even tried ohm locking at .15 ohms. If this doesn't work I'm scrapping my hana v200 and ill use it for spare parts when my vtbox 200 comes in the mail!