I noticed some people having problems with the nano popping a lot. I just picked one up cheap from a guy on craigslist and brought it home. It popped immediately. I changed to the 1.2 ohm and still, pop! I had an old .5 that I bought as a backup when I got my Mini. anyway, it wasn't one that came with the original setup. I put it in let it sit a minute and, voila! no popping. I did notice that the rubber ring on the coil was white, unlike the red ring that comes from the factory package which was poppin. nice tank, really. no complaint.
hope this might help someone
Tattoozit
hope this might help someone
Tattoozit