So I recently picked up an authentic TOBH 2.5. I'm absolutely loving this thing except for a few things. When trying to remove the jacket so I can rewick/build new coils, it is painfully difficult to get that thing off....to the point where I get worried that I might actually damage the 510 threading on the atty and mod by how hard I'm pulling. I even debated taking some pliers to it but I was too paranoid about scratching it up. As of now I just have to keep pulling and eventually that thing pops off. I have tried putting liquid on the O-rings before putting it back on and that doesn't seem to help. Is this normal? Any other TOBH users have a difficult time getting the jacket off? Any fixes for this issue?