I do have a demagnatizing (is that a word?) coil so I’m all set.
The word I remember, from the days when part of the family business was TV repair, is degaussing.
It was used on CRTs to remove magnetic fields that would mess with color images. Most of the later ones have a built in degaussing coil. Older CRTs needed a technician with an electro magnet.
It has also been used on ships to neutralize their magnetic signature and protect against magnetic mines.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)