Ah, the smell of rust, mould, and mould. I propose you're taking it to a professional repairment for a cleansing. they have the chemical substances and cleansing innovations to get rid of tarnish and mould--this can get rid of the undesirable smell from the trumpet (this occurs with older trumpets and trumpets which have not gained sufficient care). once you get the trumpet again, placed it in a secure spot and leave the case open and empty in a nicely-ventilated position for an afternoon. you could spray it with Febreze and then vaccuum it out. do not placed the trumpet again till the case is dry in case you opt for to febreze it. Secondly, is there white airborne dirt and dust contained in the case? sometimes moths opt to eat device case interiors, highly previous ones. If it extremely is the precedence, I propose you purchase a moth ball and enable it sit down contained in the case with the lid close for one week to kill the moths. After that, do like I factor out above--febreze and vaccuum it. Or, you could ask the repairman to bathe your case at the same time as he's cleansing your trumpet.