Most likely static electrical charge is responsible for attracting dust particles. If that’s true and I think it is you will probably benefit from an anti static device as opposed to a demagnetizer. Besides, I suspect that most turntable platters are not made of steel or any magnetic material, you know, what with the magnetic pickup cartridge in such close proximity.another approach is installing one or more air purifiers in the room.
Turntable Platter Demagnetizing
I was wondering if I use a tape deck head Degausser if that would demagnetize the turntable platter. Anyone out there have some thoughts on this also any other ideas about this matter ?