Squeeky keys on 12c



#2

Greetings,

This is in reference to a 2826A HP 12c in excellent shape.
This calculator appears to have been stored since its original purchase in 1989, seeing very little use.
All keys work well with good tactile response.
Sadly, the middle two rows squeek when touched even with lightest
pressure.
And of course, those keys make same rubbery sound when operated normally.
I imagine something has happened to the rubber shield beneath
the keys during its long storage.
Could it have dried out?
I took the calculator apart to find that its version does not
allow direct access to the rubber shield.
Any suggestions on how to remedy this 'squeeky' problem?

Thank you.


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