Hello, Lopanknows! Thanks for reaching out and bringing this issue to our attention! Fuzzy images definitely ruin the joy 4K content and I want to make sure you're able to enjoy all our service features, including 4K. Let's take a closer look and go through some troubleshooting together to get this fixed. Please send me a private message with your first and last name, as well as your service address so I can assist.
To send a private message, click my name "ComcastTambrey", then click "send a message".