Here lately I have been having an issue with my Solo asking if I have a new coil. I have cleaned the mod, changed the coil, and throughly cleaned the tank. If I press the up arrow it will tell me that there is not a coil. If I press the down arrow it will somtimes fire. When it does fire it is for only 1 hit and then it is back to the same thing again. This is a great mod and this is the only problem that I have ever had with it. Can anyone help?