I just got my VXC last Friday off eBay. When I turn it on, the light turns green after about 30 seconds and the unit still feels cold. I leave the unit on for 20-30 minutes and come back to it and it still feels cold to the touch. I have tried turning it off and back on again after several seconds then give it another 10,20,30 minutes and still nothing. The unit has heated up a few times hot enough for me to use and has worked great. But the last three days, it has not been getting hot enough to extract anything. So pretty frustrated seeing the other posts having similar problems. I am going to return the vape and am reluctant to get a replacement. I see they are announcing a new model and would really like one but would have to wait a while before I drop $450 on something that I am not sure about. The few times it has worked, it is a dream and does the job in a huge way. But to pay that much, I need to KNOW it is not going to give me any problems in order to justify the amount spent. So, any suggestions as to whatever I might be doing wrong would be welcomed or for any further clarification as to what I am experiencing, I am around.