Turntable Platter Demagnetizing

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.

True Geoff, one exception being the original (not the Mk.2 version, however) Thorens TD-124, which has a ferrous sub-platter, making it unsuitable for use with Decca/London cartridges.

Thanks for the exception. Now that I think about it a demagnetizer wouldn’t work on a steel/ferrous platter, anyway. Oh, well.

Auspicious first post and first reply. Can't agree that the response was indicative of arrogance and ego. 

The charged particles your supposing are not magnetic and I can't recall any platter in the last 40 years being magnetic either. Magnetism isn't your problem. A demagnetizer isn't your answer. But supposing it was, a tape head demagnetiser would be a tedious solution, and the analogy of a toothbrush used to clean a floor actually isn't a bad one at all. A bulk tape  eraser would be the way to go if you actually had he problem you supposed which you don't.