I read (I forget where) some article about taking care of your trumpet. Basically, it said not to take clean your trumpet, ever, in anyway, at all, and did I mention ever? It said you should do three things with your trumpet: 1) Play it 2) Oil the valves (He says pull them out half way when oiling them, and thats as far as you should ever have them out of their casing, period.) 3) Grease the slides It said that anything you do to clean will do nothing but harm it and waste your time. Plus he mentioned the only way to do any good for it is an ultra-sonic or chemical cleaning, and nothing besides the 3 things listed should be done by anyone other than your local instrument shop. I can see telling 5th graders who are starting out to not try to start taking their horn apart and stuff since they will have a much higher chance of breaking it, but he was getting in detail with professional trumpets, and quite frankly I don't know many 5th graders with pro trumpets so he must be implying everyone. To me this sounds ridiculous, but is there any truth in any of this?