Cleaning tube pins

Vodka on a cotton ball/swab! Also recommended by A.J. Van den Hul for cleaning styli.

If the tubes are brand-new in-the-box leave 'em alone! No need to be so neurotic!

If you want them looking brand new & shiny & they have a ton of oxidization/grime, the only way is to polish them. Usually dental polish tools are a good way. Or wet sanding with very very fine grit sandpaper.

Silver polish lightly followed by rinse with isopropyl alcohol, pins and tube bottom.

For those folks who are suggesting isopropyl alcohol, I presume this is safe to do on a tube pin that can get hot...anyone concerned about that?
Presumably the alcohol evaporates enough to not be an issue?