Sorry I don't have suggestions but it seems odd. I thought the OP said he has v2. Both my odys have v2 rebuildables and I have not had any leaking yet (fingers crossed). I use a 3.5 mm wick, and I cut 3 strands from each channel (as another poster suggested) to help with wicking. I think I read earlier in the thread to, I cut mine as well right at the drop off so maybe that helps prevent liquid from getting in from there. For the negative wire I cut a little ways up from the bottom of the housing.
Also I have used juices from 95% vg to 50/50 and everything in between in the few weeks I have had my odys (plus a peny now) and no leaking. Plus I leave the
juice control open anywhere from 1 and half to 2 full turns and do not have any issues.
Good luck. If there is anything from my builds I can let you know of besides the top just say. I have really enjoyed the odys and peny, now just trying to tell myself I don't need anymore haha.
EDIT: I will say one issue I have had at times, and maybe this is having the
juice control to open, is if I forget, as I was only using a genesis, and tip it at about 3 oclock or so I sometimes get juice through the mouthpiece.