One thing is for sure... they'll be disinfected! <img src="/images/graemlins/smile.gif" alt="" /> I can't imagine it would harm them unless it's really thin plated gold. Solid gold or quality plating should work great without harm to your newfound electrodes. I think they make epoxy that's chem resistant, but I bet the shrink tubing is the culprit.
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Experience is a hard teacher because she gives the test first, the lesson afterwards.