As far as flavored liquid destroying coils goes (as mentioned above), I think its important to note that its in large part due to the dark color of a large majority of flavored liquids - not necessarily the flavoring itself. In fact, I can say with 100% certainty that super-dark liquids WILL absolutely diminish your coil lifespan tremendously, and will coat a nice layer of black gunk on the inside of your coil. I used to take apart Atlantis coils and re-wrap or re-build them, and you wouldn't believe the amount of black gunk that would come from the inside of them after using really dark liquids. It clogs things up too, and god forbid you inhale a nice GOB of the stuff. But anyhow, WITH THAT SAID, I've never had any issues with my coils when using flavored liquid, as long as I use lighter colored liquids. Obviously the more clear/light colored the better, and the longer your coil will last. But the bottom line is, its at least mainly due to the dark color of most flavored liquids - not the fact that they have flavor in them.