lol, this is a small matter but I'm curious, so I wanna hear your thoughts. Every time I fill my Zippo with lighter-fluid, it works fine (of course). But if I leave it for about 5 days closed and not used at all, when I try to use it all the lighter fluid is gone! It's not just rendered useless, I can honestly fill the whole thing up again. And I really have to wonder, where does it all go? Where could it all go, the thing is never opened!