-
no
food or drink while playing - water is ok.
-
lubricate
pistons and trombone slides before, during and after playing
-
no
food or drink while playing - water is ok.
-
move
all slides and caps each time you play
-
store
instruments safely
-
no
food or drink while playing - water is ok.
-
only
use hand pressure to try and remove stuck slides, mouthpieces and valve caps
(mouthpiece puller excepted).
-
no
food or drink while playing - water is ok.
-
clean
your mouthpiece weekly.
-
don't
use gig bags - only use the case your instrument came in.