If your ECG graph looks funky or noisy, cancel the measurement and connect the sensor to a power supply using the micro-USB charging cable for a few seconds. Ensure that the sensor’s LED light turns red. This will reset the sensor and the problem should disappear.
Additionally, please make sure to thoroughly wet the electrode pads of the chest strap. If the issue persists, please contact OTO support for further assistance, either here by sending us a message or at support@oto.coach.