I used to have this exact problem where the Libre reader would indicate false lows. What app are you using for the MiaoMiao? I use XDrip and I find it to be significantly more accurate than the Libre reader because it accepts calibrations. If you don’t want to have the MiaoMiao attached all the time, you could just scan with your phone. That way the scanned values will be just as accurate as the ones received over Bluetooth.
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