This thing is making me crazy! I'm using the Melo5 tank it came with, 0.6ohm coils at 20-25 watts, the tank is full, the battery is charged, and it works fine for a few hours then it starts throwing the "dry hit protection" and won't put out anything. I turned it off last night to save the battery, the coil was put in yesterday morning, and first thing this morning it starts doing it again. I am so frustrated!! I emailed the eleaf people and they said they'd never had a dry hit protection error. I don't want to use the 0.15 ohm coils with 6mg juice, that's too strong for me. Funny thing is, it will work fine for a few hours, even most of the day sometimes, until it doesn't. Has anyone else had this issue with this thing? I've been vaping for at least 4 years, so it's not like I'm new to this.