Mop and Glo is not the best cleaner to use on horns. The problem is that the cleaner contains ammonia and can be harmful to your instrument if not used carefully. It can remove finish and cause the wood to rot. If you use Mop and Glo, you must be sure to wipe it off as soon as you're done and let the horn dry completely before it touches any other instrument. Also, you should only use Mop and Glo on brass instruments, not woodwinds. Or, you could buy a good buffing brush and wipe the horn down every now and then. This ensures it stays clean and shiny without harming the finish. But I would leave the cleaning to a professional every few months.