Can anyone tell me about CD demagnatizers?

Zaike, interesting! I "clean" my cd's as follows: using an antistatic cleaner cleaner from a respectable Co (J&Son, Benckiser etc). Usually available at any local s/market, I lightly spray the printed surface (i.e. NOT the data) of the cd & wipe it off with a soft cloth.

Believe me, the digital glare goes away (mostly) & the muddle turns into more perceptible detail...

As to demagnetising, I use Densen's cd -- with variable success!

Greg, have you tried using Milty Zerostat gun or Mapleshade Icon for removing static. Would seem to be less messy than sprays if they work as advertised.

Mega, I have. The Zerostat works well with the wiring in general AND vinyl -- but doesn't seem to do much for the cd. I don't know what (if anything) I'm doing wrong. I haven't tried mapleshade, but have used Nordost's spray. I use that on speaker drivers and the cdp transport with ok-to-good results. But Nordost is too expensive for extended use.

One thing is for sure. They do alter the sound of cd's. How you evaluate this change from positive to negative is purely subjective. For me, it is a must have to be able to clear all kinds of sonic smog. Even the small hand-held Bedini provides sonic benifits that is nothing short of a mojor upgrade! Try it before spending big green on new cables or a new preamplifier...

Mr. Strassner, the manufacturer of HMS cables rejects all copper for his conductor material that contains more than 6ppm of so called ferro-magnetic particles, becuse more will dgerade the sound. So maybe it is not so far fetched that the aluminium alloy used for cds contain these particles also. Maybe all alloys contain it?
So if this was true, it would indeed make sense what Furotech writes.
I will ask Mr. Strassner about it and let you all know. He is scientist (physicist) enough to shed some light here.