My first real job, post military, was as an equipment maintenance & repair tech for a large computing and office machine company.
We would go around all day doing scheduled PMs on all types of computer periphials, typewriters, and the like.
One of the standard issue items in our nice leather tool bag was a pint of carbon tetrachloride (carbon-tet, we called it). Great cleaning fluid, and non flammable as I recall. Later ID'd as a powerful carcinogen, I think, and now impossible to find. We had a drum of the stuff in the office shop area for refills...