My tv is lagging

A response delay is an indication of a signal issue.  When a remote key is pressed, a command is sent from the receiver to a Cox server.  A weak signal can cause a delay in receiving the response.

Schedule a tech visit to check your signal strength.  Request a tech with a long ladder.  Be sure the tech checks your signal at the tap up the pole where the main line connects with the drop line.  If the tech detects a signal issue on Cox's side of the demarc (box on side of your house), the tech should escalate the issue to a line tech for repairs and you won't be charged for the service call.