uh, the solution auntyjack mentioned in the original post is the "notorious" pirhana solution, isn't it? there's a terrifying story about use of such a cleaning solution in
Post 434577 (https://www.thevespiary.org/talk/index.php?topic=5929.msg43457700#msg43457700)
(jimwig: "that's what my glass man here said.", Chemicals & Equipment)
this scared the shit out of me when i saw it. no pirhana solution for me!