Okay. I know this thread is old. But My Kanger Sub Pro 7ml is burning like crazy. I washed out the tank put a new .5 replacement coil in, primed the coil in and out, juice is filled to the top - BURN. I opened it up today thinking I screwed the coil on too hard - BURN. I'm at 20w at .63ohms, still a burn but not as much. I now fluffed the cotton with a safety pin (man, that cotton was recessed and really hard) and managed to use that same pin to poke a hole in one of them - BURN. it's now reading .59 and still a burn. I did see one bubble come up from one side. What's the deal??? Only 20w???? I was running it at 25-30w for the last few weeks. Running it on my Sigelei Fuchai. Using the brown LG 3000mAh and yes, they are married.. Battery is down only 1 bar but I haven't yet let them drain before charging again. Did I fry the coil for good? Still getting burnt taste at 17w. It's my favorite juice! 70/30.