My tank is leaking why?

This is normally caused by drawing on the tank too hard. By doing this you will draw too much e-liquid into the atomizer that cannot be vapourised quickly enough, so it will just leave from the tank. Take a slow steady draw between 3 and 5 seconds long to prevent this. Leaking tanks can also be a symptom of the atomizer reaching the end of its natural life, ensure this is replaced and primed then try again.