Yeah, like I should be telling all sorts of people that I don't know and don't have a contract with, the things that I have learned in over 45 years of playing. Huskybone, get on with your project. If you are making fair progress on your own and get stuck or have a question, PM me. I am not here to get you started though. I am sure that I could pass the course myself, but that is not the point here. If you come up with a widget and want an honest opinion, you can also mail me details. I will sign a waiver up front saying that I will not use your idea for any commercial or non-commercial product. There will be no danger of stealing or disclosure to another party. Cleaning a trumpet better requires: 1) mechanical safety (horn doesn't get damaged) 2) environmental safety (mother nature doesn't get damaged) 3) user safety (person cleaning doesn't get damaged - especially if a mess is left behind for mom to clean up) 4) higher convenience than using the sink 5) cleaner than using the sink and a snake 6) better user experience (this is tough as I really like caressing my horn while cleaning it) 7) cost effective solution There are many solutions that fit these parameters. A bit of googling should make them apparent. I think this could end up being more chemistry than engineering though.