ive had my copper nemesis and omega atty for a while now, maybe 2 months, now for some strange reason im getting an unusually hot button. ive tried cleaning the mod and rebuilding coils but it still does it. im using sony VTC3 and ive noticed that there is this black ring on the negitive end of my battery, its the same size as the copper contact, ive tried cleaning it but i couldnt even scrape it with my finger nail, it seems etched into the battery.im hoping this is enough information for someone out there to help out and resolve this issue, thanks.