I am trying to restore an HP-12c (12+ years old) to best condition. Works great, looking pretty good, but it still smells a bit of cigarette smoke. Any suggestions on how to eliminate the odor? I've done external cleaning, and would prefer not to disassemble if possible.
Normally, I use ozone (low concentrations) to de-smoke things. But I'd be worried about oxidizing calculator parts. (Helpful hint: don't ozonate untreated rubber.)
Thanks in advance.
=John=