Thor's baritone he has at home (on loan from the school) is a piece of shit. he's also not very good at taking care of it and we're not very good at reminding him to...... so we decided he should finally clean the damn thing (he's had it at home about two months....

) ...and the valves and slides are all stuck. the brass coloring is flaking off all over revealing a reddish color and beest suspects this has happened inside the valves and they have corroded. We must assume that they were able to take them apart and clean them sometime during the summer when the instrument was handed in by the last student.
We'd rather not draw the teacher's attention to the fact that it hasn't been cleaned in two months ....do you have any suggestions?