I have been using the Boge cartos in my IBTanks and F16s for over a year and never had to many problems with them until now. I've never had a bad batch of cartos so I'm not exactly sure what happenens when you try to vape on a faulty carto but I'm pretty sure this pack I got has something wrong with them. I'll do my best to explain what's going on so maybe one of you can tell me if you've experienced the same thing before. It's a flavor issue. A NASTY flavor issue. It doesnt happen right away but so far on 3 of them after I vape down a one tanks worth of juice the flavor turns from awesome to suddenly tasting like a dirty icesicle from a rusty gutter. C'mon we all as kids have snapped off an icesicle and licked it if you havent trust me your not missing out but it's a flavor I dont think I'll ever forget and that's exactly what these cartos are making my vape taste like. I thought it was the juice at first so I emptied what was left put in a new carto filled my tank back up and it was fine till the tank got low again then the same taste came back. I have the same juice in my protank 2 and it tastes great, the way it's supposed to. So is this nasty chemical dirty rusty icesicle taste something any of you have experienced with any brand carto for that matter? Those Boge cartos usually last me a few weeks with numerous refills until now I'm lucky if I get 2 days out of them. So what the hell causes that disgusting taste?!