My PEM never seems to go below the third blue bar and also rarely goes above it. That doesn't seem right — that after a 75 degree night, I walk out in the early AM to find the PEM on 3rd blue. And if I walk out to the car in the middle of a 100 degree day with the car parked in full sun, I find the PEM on 3rd blue. Shouldn't the PEM temp be a little more fluid? Dropping below 3rd blue on those cooler nights and going above it on those wicked hot days?