Hello, I bought a new Eleaf ijust S battery and right now the battery is dead, because when i press fire button it blinks for 5 times and nothing happens, I don' t know how to fix, i watched a lot of videos, but nothing fixes, it might be juice leaking into battery, I popped out the bottom metal circle ( idk how it calls) and tried to remove batter out, but unsuccessful. I don't know how can i clean it up or fix it, maybe you can help me, thanks.