I installed a brand new Pentair IC-40 salt cell and when I ran the "life test" (by pressing the "more" button for five seconds) it displayed 60% life used up. I then replaced this salt cell with another brand new cell. Ran the life test again, and got 60% life used up again. Any ideas why I'm getting an obviously incorrect reading? Pentair doesn't seem to know. All my chemicals and salt levels are in check; water temp 68, salt cell is generating plenty of chlorine.