Quoted from dmbjunky:What's a socket cleaning stick? Is it like a battery post cleaner but smaller and not as stiff?
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http://www.pbresource.com/tools.html
It's # STI - a fine abrasive impregnated into a fairly hard rubber stick. Works great. I am not a fan of using anything with a brush on sockets. Always that chance of a single wire coming off & creating a difficult to find short.