I just got my Kayfun Lite Plus clone by EHPro, as I read that its one of the best, and I just wanted to say its a mess, I had so much problems with it in my first day, I had a ton of leakage from the airhole, I think all the juice would have dripped out, if I would have unscrewed the filling screw and poured out all of my liquid, then the middle glass piece cracked in 10mins, ok I had read that VG juice (I was using 100% VG) can crack plastic, but thats just funny in, like first 10mins, anyway that means that I have to use the metal middle piece, but then how can I know when its empty, if I cant see anything? Wait, that is not it one more problem - so with the metal piece in the middle, I cant see how much juice I have left, obviously, so I just wanted to fill it a bit more to not dry burn my wick, so I unscrewed the filling screw and all the juice from the tank just poured from the mouthpiece, so how I am supposed to fill it not burning the wicks and not inhaling the wick smoke with the metal piece?