Usually it is wicking, but after seeing how many times you have rewicks, I'm just throwing out another possibility. Sometimes I feel bad telling folks it's still their wicking when they have tried different wicking techniques a ton of times, as it makes me feel bad that i dont trust their abilities. So have you ever posted pics of one of your builds that was giving you issues? When it is a wicking issue with dry hits, it usually is not enough material in the coil, but it also can be too much, tails to short, tails to long , tails to bushy, tails not enough bulk or tails blocking holes.....once you have had an unsuccessful build in for a couple days and you rewicked, how easy or hard was it for you to unthread that wick from coil? Did it just slide out fairly easy? Did you have to hold coil as you removed it, as it would of bent the coil? One more thing, and sorry if you've already posted this, but what diameter is your coil? It definitely can be the orings, especially the 2 from the top cap ,so replacing them will at least drop them from the equation.