thank you so much helped

@ewan allan - of course our music shop contains a bath!! how silly of me not to think of that idea!!

I'm scared to use another brush in mine. one side broke off when I tried to pull it out, and I got it stuck and had to take it to my director.

What if the slides are stuck? I recently found a 39 ish year old trumpet and the only slide that moves is the second valve slide.

You're new to this job aren't you?

there's weird green stuff inside of mine, is that bad? I mean ik it's bad, but Is it REALLY bad?

Can you soke it in a bath

This is potentially very helpful, but every step has to be explained and not as afterthoughts. For example, "Obviously you have to lubricate each part first." Not obvious to me! With what do you suggest? Also the comment about making sure the parts are dry first. Yes, that occurred to me in light of all the soapy brushing. But you need to suggest and/or show how to get the parts dry, especially the tubing.