The 7 has run well for a year. Periodically it has screen sensitivity issues, but easy to solve by shutting off. However, over the past few days it drops the WiFi connection after a few minutes or so. The settings list shows it exists, and is "excellent," but I still need to connect it each time. I generally run it less than 10 feet from the router, which has a 50 plus Mbps output. Amy idea what's happening?