VOOPOO VINCI 40W POD… Why does it leak?

I wanted something small enough to fit in my pocket, powerful enough, and that would last me for the day. I really liked the looks of the voopoo Vinci. For the most part it is exactly what the doctor ordered, except I can't get the thing to stop leaking. I have tried to only fill it half way but it still leaks. Guessing I'm doing something wrong? Any suggestions other than wrapping it a paper towel to keep juice from getting all in my pocket? Thanks!

Original source: https://www.e-cigarette-forum.com/threads/voopoo-vinci-40w-pod-why-does-it-leak.958883/