The Gyro sensors should be reset on a monthly basis. Instructions can be found in the Zero Gyros section of the MyoMotion Hardware Manual, section 8.3. Make sure to use this feature only when the sensors are in a magnetically clean and stationary environment (i.e. no metal nearby / stable). For additional information, please contact our technical support team. Hover over the ‘Support + Learn’ tab and click on the ‘Support Request’ option.