How do I factory reset the Netgear Nighthawk AX8_AX6000 Cable Modem Router (CAX80)?

Press and hold the Power button for 10 seconds until the LED flashes red, this clears all settings and returns the device to factory defaults. You will need to re-pair all connected devices after the reset. The information is provided in 'Chapter 7: Manage Your Modem Router' under 'Use the Reset button'. (Page 82)