How long should a coil last? Until this one I was rebuilding it every 2-3 days unless I was bored and wanted to play at which time I would make a new coil. Usually a dual low ohm coil last twice as long flavor wise and a regular coil. This last 1 however has lasted about a week so far. I am not even sure if I know when it needs replacing so they probably should last longer than I am keeping them but I haven't a clue. How long should they last and how do I know besides the obvious wire breaking that it needs replaced?