Discussion about the Korg PolySix synthesizer

>Any specific product recommendation for the cleaner?

I have yet to find a good enough spray-on cleaner for these buttons.
Full replacement appears to be the best option here. The switches, but
not the switch caps and LEDs, are standard large format SPCO tactile
switches available from most electronics suppliers.

Regards,

Tony Allgood                       Penrith, Cumbria, England

Oakley Sound Systems                     www.oakleysound.com
Modular projects            www.oakleysound.com/projects.htm