Hmm, I've no idea what has been posted and then edited but for the record, yes I have tried all of the things that I would dismiss here as audio trickery.
I've played with fuses, twisted bits of 'polarised' spiro-tube from Peter Belt around my cables, built more varieties of cable than I can remember, suspended cables around the house on bits of string, tried all sorts of platforms, cones, spikes, painted my CD edges green, even painted the edges of my vinyl green!
I've been there, got the mug, T shirt and the video.....
Anyone worried about corrosion on fuses need simply rotate the fuse a few times in the holder which will scrapre down to fresh metal. Those worried about mains, phono, din, XLR, or bnc connectors simply need to remove and re-insert a few times every three months or so. Again, this will scrape down to fresh metal.
All of this avoids the need to add an extra layer of metal and saves the end user a good deal of cash. Naturally, this view is not popular with inveterate tweakers or manufacturers of expensive cables and accessories. Go figure.....
I clearly take a different view to many people here on these things but I'm certainly not alone and that voice and view needs to heard IMO. I believe that I've stated my view without insulting anyone, so whats the problem?