I've been using a DSE901 for about 2 wks and I'm ready to pull my hair out. I'm so jealous of all the vapor that the youtube folks get out of their ecigs. I've tried the polyfill, blue foam and tea bags and get virtually no vapor at all. I've experimented with the amount of fill, amount of juice and still can't get that wonderful cloud of vapor that I see on youtube. My batteries are fully charged and still nothing to speak of. All I get are sore cheeks and a metallic taste in my mouth. What am I doing wrong?