Mr Salmon your experiences with ECO3 can be duplicated at only 20% of that cost, by picking up a spray can of Endust for Electronics locally.
From there I would move on to a good dry contact cleaner (dry meaning without any oily residue base) such as Kontact.
Next get yourself a good interconnect cooker such as the inexpensive Mobie, available from Chicago's Music Direct. A speaker-level cable cooker such as the Nordost will speed up that process for your speaker cables & AC cords, but that can also be accomplished a few other ways at less cost, unlike the interconnect cable cooking process which does require a burner box.
Cryo treatment would be my last endeavor, because all of the aforementioned enhancements can be done first, at home, therefor leaving the effects of cryo, if any, to be more easily realized separately from the other treatments.
From there I would move on to a good dry contact cleaner (dry meaning without any oily residue base) such as Kontact.
Next get yourself a good interconnect cooker such as the inexpensive Mobie, available from Chicago's Music Direct. A speaker-level cable cooker such as the Nordost will speed up that process for your speaker cables & AC cords, but that can also be accomplished a few other ways at less cost, unlike the interconnect cable cooking process which does require a burner box.
Cryo treatment would be my last endeavor, because all of the aforementioned enhancements can be done first, at home, therefor leaving the effects of cryo, if any, to be more easily realized separately from the other treatments.