Jay,
Cramolin or "Deoxit", made by Caig Labs is a product classified a contact cleaner or "enhancer". I get mine from MCM Electronics. It is available in a variety of forms but I use the the 100% (versus diluted) "red" that comes in a little squeeze bottle, with a hypodermic-type tip which is useful in getting it into "tight" places.
The idea is to put it on (or "wet") a contact, wait a few minutes, then remove as much of it and the "bad" residue as you can with a tissue or Q-tip. I routinely use it when working on "classic" hi-fi equipment - on tube pins, switch contacts, input/output connectors and in "quieting down" noisy volume/balance/tone controls. It really works. From time to time I also use it to "clean" all the interconnect/speaker contacts on my system.
Please understand that its use is controversial, with detractors claiming adverse sonic effects.
Caig also makes a "green" solution which they recommend applying after finishing the red treatment. It is supposed to "preserve" the cleanliness of the contact by delaying corrosion. I don't use that.
There are other similar products - "Tweak" comes to mind - if it is still being made.
As a sidebar: I had a conversation with Paul Jayson of Viola Labs on this "contact" issue - as it relates to interconnects. For those who remember - most all the input/output connections on "early" equipment used tin or nickle plating which would severely corrode over time (in some cases a relatively short time). Paul opined that one benefit of newer technology is that the materials used in "modern" connectors is just "better" (let's not go into why) - in general they have less sonic "baddies" AND the cable/equipment connections can go much longer without "maintenance". Like every so often unplugging and re-plugging everything on your system.
Happy almost Summer
Charles
