Discussion about the Korg PolySix synthesizer

Hey all. My Poly's "B" bank button finally stopped working. Had always required multiple pushes to get it to work ever since I got it in '84. 

Would some tuner/pot cleaner sprayed into the crevice around the button (with a tube) help? I think it just oxidized to point it won't work right. Can change patches to that bank just fine via MIDI but would like to use it live and use the button.   

Any specific product recommendation for the cleaner?

TIA

- Ells


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