It’s never a bad idea to factory reset an accessory before adding it to your setup for the first time, but it’s also handy to know how to do it for troubleshooting or, as is the case here, removing biometric data. Factory resetting is particularly important with the Koogeek L3 Smart Fingerprint Lock since a full factory reset is the only way to remove any fingerprint from the lock. This video walks you through the process.