I've been vaping for almost 6 years, and I've been using RDA/RTA/RDTAs for 5 of those years, and no matter how I wick my coils, I always feel that I used too much or too little cotton. Sometimes I think I did a good job with the wicking, however when I try to use the same method again, I feel it's too tight or too loose. Is that something anyone else has experienced? what are your tips for wicking correctly more often?