that's one thing with the swag px80 I'm noticing as well, condensation around the bottom of the
tank and every now and then a little in the mod where the
tank sits....
apparently others had this issue and switched from the .2ohm coil to the .3ohm coil and it stopped. guess I'll find out when it's time to replace the coil. But for now it's shelved because I was killing my
batteries 
I can't use a single battery mod, I eat through the battery in a few hours....

dual batteries I go through in maybe 6 hours