Hi May,
 
I know it may be going somewhat off subject, but I've been using a handheld tapehead demagnetizer on Records, CDs, DVDs, Cassettes and Videocassettes  since about the late mid nineteen nineties, as part of my routine and is usually the last thing I do before clipping. I believe I told you about it , May, at the time. I'd read about it in "Hi FI News". It was a tweak originating from the U.S.
The result is a bit like what happens using the old PWB Polarising tweezers, but more so. Louder, more three-dimensional and alive. The only measurable effect, I would think, is a faster heartbeat. Could that silence the critics?  
       Best Wishes from a trembling
                 Paul Rowan