cable connector cleaner/contact enhancer

bcowen, I agree with you on the rubbing alcohol. I mentioned "rubbing" alcohol previously but yes I too look or isopropyl or a high purity alcohol. Everclear is a pretty good choice :)
https://en.wikipedia.org/wiki/Everclear_(alcohol)

Use Kontak here. But my research led me to believe that the lack of residue, over time would be worth it. 

Thanks all for weighing in.  It seems that most of your comments are in favor of cleaning contacts as opposed to conditioning.  I think that is the best way to go.  The less product between connectors the better.

Kontak and Stailant 22.

Be advised the cleaning of all outlets in the abode is important, even the non audio ones. They all feed back into the audio system. Dirty or oxidized surfaces can produces micro arcing that generates noise.