If the LED on your Lumo Lift flashes when the Lift Sensor is connected to the charger, or the LED flashes immediately after the Lift Sensor is removed from the charger, or the LED remains on after removal from the charger, please try a sensor cradle reset by following the steps recommended below:
1. Place the sensor in the charging cradle, with the cradle connected to a USB power source (e.g. a USB port on a laptop, or a USB charging block).
2. With the sensor in the cradle, press and hold the sensor button for 15-20 seconds or until the device LED flashes blue / purple and vibrates once.
If the sensor behavior does not change, please submit a request here.