Well, I hope I have better luck. I just ordered 5 dualcoils and 5 Boge cartos. I am having the same burning issues. All my searches have only turned up keeping the wick wet, which we have both tried and doesn't work- and cleaning well.
I have 1 working atty now, out of 4. I only use unflavored, so I don't have gunked up issues. Right now the only thing different is that my working atty has only been alcohol cleaned (90 percent). The 3 I can't seem to get working were rinsed in water, shook off, rinsed in alc, shook off, set to dry for 1 week.
The one that works was rinsed in alc., blown dry and put into use the next day. I've been using it for 2 weeks now, and blow it out a couple of times a day.
I can take the cart w/ juice off that, prime these bad ones, and I get burnt taste after 6 hits. So my cart is good, juice is good, that only leaves the atty as the problem. Only thing I can think of is that I should've blew them dry- that I now have water deposits on them or something else that is keeping the wicks from staying wet.
Tomorrow, I'm going to soak them in vinegar to remove the water deposits, rinse them in alcohol, and blow them dry.
We all seem to be doing the normal things and IT'S NOT WORKING!!! Nobody seems to have the answers for this problem.