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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
I think it is gold-plated copper PCB, because it seems possible for the contacts to come off completely.
As mentioned in my replies above, I really strongly think that plating with some other substance (like gold) will not solve the underlying problem. About the only way to fix things properly is to insulate the middle two contacts