On 9/21/20 4:41 AM, Tom Hunter via cctalk wrote:
I cleaned the now exposed membrane using Isopropyl alcohol - no change in resistance.
https://deskthority.net/wiki/Membrane_keyboard#Spring_over_membrane you exposed the top of three sheets. the contamination/deformation is between the two outer sheets many people have complained about switch failures in osborne keyboards it is probably corrosion between these switch layers you might be able to change something if you can inject a solvent into the side of the switch by drilling through the top layer, but just a solvent on top will do nothing
