Posted by The answer has... on February 22, 2002 at 07:58:32:
In Reply to: Red Rot posted by Callmeapple on February 21, 2002 at 10:53:01:
Just dropped off the bottom of the board: there's a whole discussion on this. I cleaned my tuba with diluted CLR, as per one suggestion. The next day there was another suggestion that white vinegar or lemon juice was milder.
Cheers