Hayward aqua-rite

I hate to bring this up again, but despite trying 2 boards, I still am getting a much higher reading on the salt than is actually in pool. I've taken samples to 2 diff pool stores, and tried some steps, reading 27--2800. My hayward keeps telling me 3300-3500. Instant reading about the same. I've tried the calibration, but it goes right back to higher levels. ps: cell is less than 30 days old.
 
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