If it is the wicking then you should be getting juice in your mouth, although it can depend on how hard you draw. If i draw hard it goes in my mouth and if draw slower it will leak out of the air holes. Just try re-wicking it and use plenty to fill the juice channels and go from there.
I use a Zephyrus and it can be a real pain to get the wicking right. Especially if the juice is a little thin. Mastering any specific atomizer can include a small learning curve. I know that the thickness of the juice i'm using will determine how much wick i need to fill the juice channels with. So i'll start with a lot and vape with that, and if it's not wicking enough i'll just trim away at the width of the wick in the juice channels just so it will allow more juice through. The length doesn't really matter but if it gets in the way when i re-assemble the atomizer then i'll trim the tiniest piece off i can.