I bought some Blueberry Cheesecake /w vanilla custard and some German chocolate cake. I've been using both for almost a year. Throughout that year I figured myself new and tried a variety of devices. I always went back to smoking analogs after being frustrated with atomizers, cartomizers, and clearomizers, all tasting burnt after less than a day of use. After getting my hands on some other more clear looking juices, I think I am going to have to shift the blame to the juice. Here are things I've tried: Joyetech Ego Tank-A atmomizer cones and A type tanks CE4 and CE6 clearomizers Joyetech Refillable Ego Cartomizers Venus Rebuildable Atomizer and Dripping Both juices are clearly thicker just by examining the bottle compared to my other juices. They are also very dark in color after sitting over time. They are 70/30, so they shouldn't be that thick. I am beginning to wonder if maybe they've just expired? Perhaps there is some evaporation that occurs over time? Maybe there is some ingredient that leaves a residue? I can see black residue in the atmoziers that I've taken apart. They seem to build a crust over a day's time. Looks like burnt marshmellow. You can scrape it with your fingernail. Perhaps they could be salvaged through some thinning with some unflavored PG/VG? I love the taste of these juices and really want them to work, but they have to keep working more than a few hours without ruining my equipment. Now clearly than A type Tanks are prone to not letting juice through unless it is thin, but I still have these problems even when dripping and skipping the tank. What alternative do I have, bu to blame the juice? I don't have this problem with my other juices that are more clear in color. I've also examined the atomizers after they start tasting burnt and there is clearly burned residue caked onto them. I've also tried cleaning nightly, every other night, etc. with iso-prop alchohol, but more often than not the atomizer sucks so much worse than when I first got it that I just throw it away. Any input? Other people's experience?