hey guys, bought an iPad on ebay. I have been using it for a while now (2) days. The seller did not provided the 10 watt charging, so i turned wifi off my ipad and let it charge through the night with my iphone charger (cube) not usb cable and every time i plug in my iPad with my mac it doesnt detect it, so i unplug the usb cable like 5 times until it says Charging.. Also when i connect to the iPhone's charger, it doesnt detect it so i have to unplug and re-plug. there are times where it picks it up right when i plug it in. is this an issue with iOS6 or should i take it to the Apple Store?