Richard Clark wrote:


This all returns to the same lack of need when tightening up the
contact spring would do the trick just as Mark described. The "good"
chemicals that have been suggested are not cheap, and the "bad"
chemicals (Hydrochloric Acid no less) are extremely cheap to get, but
a pain to get rid of.

Not that I'd ever use Hydrochloric acid, but aren't we talking about a
simple acid/basic reaction to turn it into something benign? I used to
use an acidic Cibachrome photo developing solution which we used some
magnesium hydroxide to neutralize.

- Mike KB3EIA -