Comcast Sign in and Sign out the problem
Every Comcast email account holder is entitled with a specific user name and its password. You have to use the correct combination of user name and password. If you miss any of these; you couldn’t be able to sign in. Here is a quick help for you; simply use the link www.xfinity.com/password and reset your password.
When you find difficulties while signing out and getting blank page; you need to understand that the browser and internet is creating the problem. Simply, check your internet connection and clear browsing history and cache. If needed; you can call Comcast email customer support toll-free number for any help.