My Kindle Fire will randomly lose the wi-fi connection. When I go to reconnect it, the wi-fi manager won't let me select OFF or really do anything. I have to reboot the device, which used to take less than a minute but now takes upwards of five minutes. Also, the KF will randomly reboot itself, or another of its tricks is to go to a plain black screen (not off) and not respond until I hold down the power button to force a reboot. The thing is only a year old. Yes, I've tried a factory reset. No, that didn't fix anything. Yes, I emailed support. No, that didn't get me anything but a useless automated email recommending I reboot the KF. How about that legendary Amazon customer service?