I've owned a G25 for my PS3 for many years but suddenly seem to be experiencing calibration issues. It starts off fine but after a few turns the calibration goes awry to the point that keeping the wheel straight results in the car turning and this applies to all games. I've tried reconnecting all the connections but to no avail. I've also noticed it sometimes needs to automatically calibrate several times when first switched on, which seems slower than usual. Any advise would be appreciated.