How did you demagnetize it? Something very similar to the "Electronic Watch Demagnetizer" posted a bit lower. This is a coil connected to mains. One holds the magnetized bit near the energized coil and slowly moves it away; the alternating field will end up demagnetizing the bit as it get...

I had a problem with the compass: got the error message "accuracy low, please recalibrate". I'd recalibrate, and the message "calibration successful" would immediately (within a second or so) be followed by "accuracy low, please recalibrate". I found this thread... mayb...