How do you clean tube pins?

You can clean sockets and tube pins but it should be done with caution!

Do not use any abrasives. The best thing I have found is spray contact cleaner that leaves no residue. DO NOT UNDER ANY CIRCUMSTANCES USE ANY "CONTACT ENHANCERS"!!!

-If you do, you can contaminate the socket and possibly ruin the circuit board on which the socket sits or at the very least the socket itself. Contact enhancers can be identified as they usually have to be applied with some sort of swab and they most definitely leave a fine film. This film can migrate across insulators such as the socket material. This can degrade the performance of the circuit dramatically over time, and can even damage components! We had a customer ruin a set of circuit boards in his MP-1 preamp once- the only solution was to replace both boards with new components.

Tubes can have high voltage differentials on them so if you contaminate the tube or its socket you can get leakage voltages and stray capacitances that should not be in the circuit; that is how damage and degradation can result.

So: to clean the pins or the socket, use a spray contact **cleaner** that leaves no residue. Spray the pins of the tube itself, wipe off excess, insert in the socket and pull it out again. If a miniature tube, rock the tube in the socket and you are done. No more than that!

Tin plating is a common sight on tubes and tube sockets. Like gold, tin is highly conductive and does not corrode easily. Unlike gold though, it is rather hard and so holds up much longer to use. However it is, just like gold, a plating on the pin of the tube and the socket. If the plating is damaged by abrasion (such as steel wool) the result is that the material beneath the plating will be exposed to oxygen and could see significant corrosion! SO DO NOT USE ABRASIVES WHEN CLEANING TUBE PINS OR SOCKETS!

BTW, the use of silver and gold in tube connections really isn’t that great an idea. Tin is much more reliable in the long term. This is why you can still find tubes and tube sockets on ebay that are decades old and yet are perfectly serviceable.

Ill often use 0000 wool and DeOxit. Not in tube sockets, pins are okay. Inspect and blow them off with compresses air then apply a tiny bit of dielectric grease where its suitable. I like putting it on RCA poles it saves having to wrestle some of the very tight ones off and potentially breaking something. 

I forgot to mention good hobby stores usually have an array of cleaning mini utensils and mechanical tools for RC that can come in handy.  

I should also say I trust the lightest steel wool. One or two even three cleanings will not remove a quality plating it just isnt aggressive enough. By the time it would it wiould have taken countless cleanings by then it would be time for new tubes anyway. I use it on open grain fine furniture if it needs a good cleaning among other things. I can see how people would think "yikes steel wool", the light stuff isnt as aggressive as some may think. The name implies disaster and there can be some truth to that. I would probably option something else when it comes to something like an auto finish or jewelry, eye glasses, that sort of thing.