my black/gold SX-90 Tenor seems to accumulate a lot of spit (everywhere!). I usually use a little bit of water on a vandoren cleaning cloth,and it seems to do okay. I was thinking that maybe the water might be bad to the finish, and now I seem to notice that the springs for G# and the table keys appear to be rusted. I know tons of spit leaks from the bis-key pad and goes to the table keys, as well as the rods that go down to the bell keys, but is this sometihng I should worry about? Are there any other types of cleaners that work? should my springs be rusting?