Way back in the olden days I remember my uncle putting a shot of vinegar in his tumbler, I'm not sure why or what it did but I remember him doing it.
Acid helps clean a bit.. Lots of folks who tumble with wet S.S. pins use lemishine, which is citric acid.
When I despair, I remember that all through history the ways of truth and love have always won. There have been tyrants, and murderers, and for a time they can seem invincible, but in the end they always fall. Think of it--always.