[Jolida302]

Here are mine:

-Caig products: "Deoxit" and "Progold" applied on all contacts and cables, including power/batteries contacts and there are many others products from this great brand.

-Demagnetization of all cables using the "Enerco" plate, a plate generating a high quantity of negative ions.

 

[monolith]

I think that if you could show demagnetisation of a short cable carrying audio signals has an audible effect that you'd win a Nobel prize.

 

[Jolida302]

You forget contacts!