The reset button is a tool of last resort, not a daily habit. Avoid resetting for these reasons:
If your scale is displaying "Err," showing the wrong weight, or failing to sync with the app, you likely need to hard reset the sensor. renpho reset button
If resetting doesn’t fix your sync problem, the real culprit is almost always: The reset button is a tool of last resort, not a daily habit
If you can’t find a pinhole, assume it’s a battery-pull reset. " showing the wrong weight
Here is the full guide to resetting the most common RENPHO devices.
Only perform a factory reset if you’re giving the device away or if the soft reset fails three times in a row.