cartridge demagnetization

Here is some more info about it
MC Cartridge Degaussing Demagnetizing

In my beginning of my audiophile career, you know, young, no money but enthusiastic and hungry for every tweak which was able to lift my system to a higher lever without investment in serious electronics...to make a long story short...I grilled the coils from my Lyra, my Dealer smiled and sold me another one. Super.
In all the following years I never used the Demag grill again and guess what...I never even thought about it until I read this thread. I can live very well without that but others may think different. My first question to a cartridge seller always was "Did you demag it with a battery unit" and when he said "yes", I stopped any further discussion at once. One of my golden rules ...