Why is the line much higher with new sensor?

Sensors can take a couple of hours to calibrate themselves.

If you are still getting unexpectedly high readings after an hour, check back over what you’ve eaten or for any stress or exercise to make sure there is no reason why the line should be high. If you can’t identify a reason it could be that the sensor is calibrated slightly differently to your previous one. You can still use this sensor to check for the general trends and shape of your line.

We will monitor any concerns with sensors and recommend you remove it and replace with a new one if necessary.