Can somebody give me advice how to clean contacts of a precision resistor decade, without doing any harm to it?
I used a dry cellulose swab wiping the contact, but resistance is still unstable (rising slowly)...
I'm not quite sure, how to relubricate contacts (I'm not a believer to magic contact cleaner chemistry voodoo). There's still enough grease on the remaining contacts, so I hope it will dispense to all contacts some time later in normal usage.
Root problem still remains.
Some wiggling the dial helps temporarily, but some minutes later, resistance is increasing again.