Believe it or not, today I am going to try some degaussing.
On my most recent flight in my airplane I noted the magnetic compass was not doing much of anything. It was indicating magnetic headings that were very wrong.
I have seen that before and solved it, more or less, by relocating the compass to lower on the instrument panel. Well, the problem is back and I suspect that my recent use of a magnetic flashlight on the steel frame for the windshield magnetized that structure.
Years ago, more than 25, I think, I tried demagnitizing the frame by hooking up wire and a Variac. I got the frame humming nicely at 60 HZ, so I probably was doing something. Some time later I tried again and only succeeded in nearly melting the wire.
So I am going to try to use a Variac AND a 6V transformer and see how that works.