Resetting the router resolves minor glitches and errors that you might be facing with your device. Here are the steps on how to factory reset router Xfinity. Make sure you are connected to your network. Type http://10.0.0.1/ in a web browser to go to admin tool and sign in. Then, enter your username and password. There would be five reset options once you navigate to troubleshooting, click on the Reset/Restore Gateway.