Hi I have a Logitech g27 racing wheel and when the USB Cable is unplugged from my pc and the wheel is left plugged in there is a lot of static electricity running through the metal parts of the wheel and the USB for the wheel has even given me a mild shock but when the wheel is plugged in to my pc it stops. I can even feel the static with shoes on could it be a grounding issue and could the static be going to ground through my pc. I am really not happy about plugging it in to the pc in case the wheel damages it with me getting shocks from it. my other g27 never did this so would I be right I thinking the wheel is defective and should I send it back to the store?