I'm pulling out my older RF gear 1 by 1 to use a little Radio Shack contact
cleaner on the interior switches. On my Nav radio I noticed a bank of
rotary resistors (guess they are resistors since they are labeled R1, R2
etc.) and I am tempted to treat them and turn the pots back and forth a bit
to make sure they're clean. Does anyone know if they are too position
sensitive to set back into their original positions by eyeball? Any other
comments about using or not using contact cleaner are also welcome. Thanks.

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Regards,
Mike