I'm currently using an innokin coolfire Z80 zenith 2 starter kit. I keep getting a high temperature warning. I'm not sure if it's a coil issue, 18650 battery issue, or an issue with the device itself. I did a refresh and a factory reset and put in a new coil but still have the same issue. Is there anything else I can do or try to fix this issue? Thanks in advance, you guys rock!