better than any magnet, put the cd's you plan to play in a pre-heated oven (350 deg. F) on a greased cookie sheet for about 2 1/2 hrs. CAUTION: this will likely melt your software, but it will give you sonically more satisfying results than you're likely to attain with eletromagnetic waves. and at a tiny fraction of the cost of a bulk eraser!
Using a demagnitizer on compact Discs?
Does anyone use a "bulk" demagnetizer (like one uses to demagnetize a video tape or cassette tape)on compact discs just before playing them? Does it improve the sound of the CD? Can you describe how the sound is improved? Is the improvement signficant to you? Does the improvement warrant the cost of the demagnetizer and the time and effort to demagnetize a CD everytime you play it? I do not understand how a demagnetizer can have an effect on a compact disc (which is not magnetic) but I have been told it DOES have an effect. Thanks for your indulgence.