I have seen many people post on here about higher channels pixeling. This is happening at my home as well. Seems to mostly affect those that are part of the Discovery family. In the evenings it is worse than during the day. My cable was ran to my house 17 years ago. It happens on every TV and all my connections are secure inside the house. Nothing new or has changed. How do I convince Xfinity to send someone to check the outside line.