[Coco] Keyboard cleanup options

[Bob Devries]

Hi all.
I've got a handful of keyboards which do not work reliably.

Can people give me suggestions regarding the cleanup of the Mylar 
connection ribbon? The failures appear to be different on different 
keyboards.

One or two show signs of corrosion along the tracks on the edge of the 
Mylar, Cleaning the Mylar seems difficult. Has anyone else done this?

Regards, Bob Devries
Dalby, QLD, Australia