Have been looking for a solution but cannot find one. I recently got a J tank from electronicstix.com and just got done slotting my carto. Then I was watching the video on their website on how to fill it. He says he lubes the seals but doesnt say what he uses, I was just using my regular juice but I think ive heard of people using 100% PG for this? The ease with which he pushes the cartomizer into the tank and through the top cap, and getting the caps on, is night and day difference from my new tank. I lube the seals up until they are soaking wet. I had to use vice grips to get my cap on the tank, and my friend said he also had to do this with his new tank. I gave up frustrated and with juice all over the place. It seems like my seals are simply too tight no matter how much I lube