I have my own way of doing things so I can't really suggest any one surefire way to stop the leaking.( I use just VG on all the o-rings. Has served me well so far.) First thing you have to figure out is if it's leaking from the lower o-ring or if it's from the *center* of the positive pin of the 510 connector. Kinda tricky; you have to hold it over your head and look up without it dripping on your face. dwcraig1 uses vaseline to seal his o-rings. I'd suggest trying that with one o-ring at a time (from the bottom up) and see where the leaking stops. If it does not, then most likely it is leaking where Craig previously stated (mouthpiece/o-ring @ the ceramic).











