Has anyone else had trouble with their .05 EC Coils only lasting a few days? I have the same setup - Melo2 or IJustS tank - same juice I've been vaping for months and the new coils just don't last. I've verified that they're authentic, at least the box is, and I buy them from the same vendor online, in Colorado. Have they changed something about them? I did notice that they're packaged in clear packages now rather than the foil blister packs they used before.