Ive been having this Gold kayfun v4 from fasttech since February . Obviously it is a clone . What I noticed since day one was that it was not heating up fast enough . It takes longer than all of my other attomoziers for the coil to light up when I am dry burning it and it produces the least amount of vapor . Ive taken the whole thing apart many times to see if I can find the problem but no sucess . Does anyone know what might be causing this ?