I've been vaping for almost a year now. A couple of days ago I upgraded to the eleaf istick 30w in black. I used it, it was great. I charged it over night and the next morning it was blazing hot and would not turn back on. I took it back and traded it for another one. Again, it worked great, I charged it last night. This morning it was fully charged and working. Then all of a sudden it is off and won't work. Is anyone having these issues? My wife also has an eleaf istick 30w that she has been using for over a month, using the same charger with no issues. I'm not sure what the problem is. Any ideas? Thanks in advance.