Sign in to your Xfinity account at xfinity.com/myaccount or in the Xfinity app
Select Internet
Choose your WiFi network
Select Edit WiFi settings
Enter a new WiFi password
Save the changes
Reconnect your devices using the new password
If you forgot your Xfinity account login, use the Forgot Username or Password option
If you cannot access your account, contact Xfinity Support or use the Xfinity app to manage your gateway settings