[SteveFord]

Being an old biker type, I use dielectric grease on just about every electrical connection in sight.
Assuming that you don't blob it on like an idiot can anyone think of a reason why a shot of CRC contact cleaner followed by a coating of Permatex dielectric grease on audio connections should NOT be used? 
I've asked elsewhere and the answer was that everyone uses Caig deOxit followed by other Caig products but that's not really an answer.

[Devil Doc]

It's not expensive enough?

Doc

[*Scotty*]

Steve, both products form a thin layer of non-conductive oil between conductors and act to keep contacts from oxidizing. The thinner the layer the better Caig ProGold works. I use an eyedropper bottle mostly full of 90%  plus isopropyl alcohol with 5 drops of ProGold in it. A drop or two on RCA plugs does the job re-applied every six months.
 It kind of depends on what sounds best. A contact with a lot of slop and a thick layer of dielectric grease and it might be possible at millivolt signal levels to come up with an open circuit.
On paper grease is grease and you could use pure petroleum jelly for this application. I use Vaseline on car battery terminals and headlight connection sockets.
  Scotty

[SteveFord]

Thank you, both - that's pretty much what I was thinking.

I do the same with Vaseline, too.  Having a light bulb snap off in your hand is really aggravating.