Iphone 4 will not charge on any wire, device, or computer
Started a few days ago. Had trouble connecting on my docking station. Then would not register on either computer, docking station, wall charger, car charger, or multiple wires and died. Cleaned the charging port with compressed air and a pin to remove lint. Worked! Charged it like normal. Now it says not supported charging accessory on everything and will not charge. Plug it in and charges for about 10 seconds, then the battery flashes twice makes its connection noise and brings up the charging message on everything. Did a factory restore, and still did not charge even will conected to itunes. I am running out of options.
thanks
iPhone 4, iOS 6.1.4