My kindle connected to the WiFi perfectly for about a year, then it was stepped on. Only the screen cracked, but then the WiFi would only connect if I was within three inches to three feet of the router. Then, it did the authentication problem and I did a factory reset and it was doing the distance thing again. It connects fine with other wifi's when I sign in to them. Other devices, both apple and android connect except mine. Very annoying, please help, I'm out of ideas!