Overnight I was charging my phone, I woke up this morning and the usb cable was melted, but just the end part where you plug it into the iPhone. My phone was a little hot, but not too much. I'm not sure if it's my phone or the usb cable that's the problem. So, I'm not too sure what to do. I made an appointment with Apple, but I can't go till Friday or Saturday. I'm running ios 5 if that makes any difference.