A few weeks ago I bought 5 .5 vengeance replacement coil heads by council of vapor from vape society supply. I am running it on an istick 50w eleaf. I have the Watts turned down to 25.0 and some 50/50 3mg juice in it but I'm still getting a burning taste. So far I've tried 3 out of the 5 coils and they all have the same problem..I've even tried different juice in it as well but there's no difference and when I turn it down below 25.0w it doesn't produce almost any vapor as if it's not enough power..can anyone give me some insight on what I'm doing wrong please?