I'm new at this so take what I say with a grain of salt...but the first one was fine with my clearomizers until I got the cone for it. I wanted to use the carts, too. Up to that point (about 2 weeks) it was great, then I put on the cone and the cart and that's when I started having problems it seemed. I posted and got the advice to lift the center post and that worked for awhile, then it quit again. Finally I put in a ticket to get another one because I got tired of messing with it. This new one arrived and I was so excited.....but nothing.....no vape at all with anything and nothing I did worked. (wouldn't even work as a passthru while it was charging) I tried the same tricks with it, trying to gently lift the center post (made it glow brighter, but still wouldn't work), tried cleaning it, making sure all the holes were clear. Finally after the last try (and one last try this morning) it started just blinking and wouldn't stop. I plugged it in the wall socket, still wouldn't stop blinking, then I plugged it in the computer, then it stopped blinking. I unplugged it and put in a ticket and put it in an envelope ready to go back as soon as I hear from Heather. I don't know what else to do......really bummed.
But then I saw this thread. I'm glad to know maybe its not a little cloud over my head after all.
I missed whether your problems are with manuals or autos? I have a theory on the cones and this is purely my guess based on what I've experienced. If you look closely, you'll see the cone, when screwed down on an X2, completely blocks the air intakes on cartos, CE3's etc. Because of this, I'm guessing the coil tends to burn hotter (pull more current) and thus can cause burnt flavors etc. I really like the look of the cone on the X2 batteries but wasn't willing to risk premature burnout. So, I drilled a 1/16" diameter hole in the cone which allows pretty good airflow to the coil. Seems to work OK. Be REAL careful drilling the hole or you'll ruin that nice finish on the cone (ask me how I know)