I got my Dual coil cartomizer 510 about 2 weeks ago, I was excited to try my first one, but to my disappointment the vapor production is very weak. I already use 2 of the cartomizer and got the same result. Since then i went back to my Ce2 cartomizer and I already sent 2 tickets to madvapes and have yet to receive a reply which I find unusual because they always quick to answer my question. Anybody having the same issue? did i receive a bad batch?