Logitech MX Master 3S Manual page 55

2. Hold down the Shift and Option keys, and then click the Bluetooth icon in the Mac
Menu Bar.
3. The Bluetooth menu will appear, and you will see additional hidden items in the
drop-down menu. Select Debug and then Remove all devices. This clears the
Bluetooth device table and you'll then need to reset the Bluetooth system.
MX Master 3S FAQs 55