I worked with a guy that would tell people that coax needed to be "released to ground" occasionally, by unhooking the cable and putting your thumb over the end. That's how he made sure people were disconnecting and reconnecting the cable from the back of the box. He also told someone that "data might be trapped in the Ethernet cord" and advised they unplug it from both ends and swing it around their head in a circle to "loosen the stuck bits and clear the line"...