when vaping my protank with ego twist and 4.8 volts with a 2.4 resistance atomizer, it begins to heat up during longer hits and will actually get hot to the touch along with hot vape although its bottom coil, iv tried diff heads all the same. and its a new problem. never experienced this before and iv always vaped at 4.8. I haven't used an ohm's reader to double check the resistance but they should be around 2.4.