My Wi-fi connection fails after every time I put my iPad4 down. The only way to re-establish a connection is to reboot. If I go to settings/wi-fi it sees my network and the little spinning wheel as if it's trying. It never connects. I have tried clicking on forget this network and re-establish. Re-spring. That doesn't work. Nothing works except a reboot. Once a connection is made it usually holds. That is until I put it away. It's as though it forgets the password or something. But only after it's been sleeping for a spell. Any thoughts on a solution?