To avoid a world of pain and anger, if you own a device that is out of warranty and you are instructed by an advocate to carry out a factory reset as part of their robotic boilerplate template troubleshooting steps, don't. In all likelihood, it will ruin your device and because it is out of warranty Fitbit will not replace it but offer you a 35% discount towards the purchase price of a new device. They do not understand the concept of duty of care and they will not take any responsibility for the device THEIR recklessness and negligence has ruined.
You will need to check the warranty status of your own device before contacting an advocate because they won't. They will happily put your device at risk. The only time warranty will get mentioned is when they can't do anymore troubleshooting because they have damaged your device irreparably and the case gets passed to their warranty department, who then just shrug and abdicate responsibility. You have been warned.
If your device is counting too many floors but everything else works, live with it.
If your device is not recording sleep accurately but everything else works, live with it.
If your device is missing steps but everything else works, live with it.
You get the idea.
Only if NOTHING works and you cannot use your device at all should you do a factory reset.
If your watch is within warranty, let them ruin your device because they will replace it in those circumstances.
