How do I clean a trumpet?

The short version: empty the water key and wipe the horn down after playing, oil the valves a few times a week, work the tuning slides with fresh grease monthly, and give it a full bath about once a year, which is worth letting the shop do.

Start with the part nobody says out loud: the reason trumpets need cleaning is that people play them after lunch. Don’t eat or drink anything but water right before playing. Sugar in the horn is what becomes the gunk in the valves. That one habit prevents more trouble than any cleaning product.

The routine: empty the water key after every session, wipe the outside with a soft cloth, oil the valves a few times a week (not once a term), and work the tuning slides with a little grease so they keep moving. The slides matter more than anyone tells you: a slide that sits untouched for two years can seize entirely, and freeing a truly stuck one is real workshop surgery. In and out once in a while, fresh grease, done.

How often a full bath? Honestly: it depends on the player, like asking how often a car needs a wash. It depends how much you drive and where. Everyone’s chemistry is different, too; some players have more acidic saliva and their horns need attention sooner. For a typical student, a thorough cleaning about once a year is right, and that one is worth having the shop do. When we clean an instrument we are not just making it shiny. We play it, check every valve and slide, and catch small problems while they are still small. We offer a wipe-down and lubrication service for a small fee, and the yearly deep clean is the best money a trumpet parent spends.

Never use metal polish. It eats through lacquer. And build the relationship with your shop: the instrument is our responsibility too, and we would much rather see it once in a while than meet it for the first time in a crisis.