I don't know if anyone else has had this problem, but hopefully someone has AND knows a fix. I have had my ego for a little over a month now and it no longer charges on any of my new slim chargers. Other batteries charge just fine on them. The only way to charge it is vis the mini USB inside when you unscrew the cap on the end. Now when I try to use it the light comes on the button as it should but it makes no vapor at all. I've tried other cartridges to no avail and it is basically hosed. Anybody know what this could be and if there may be a fix?