Care of Your Instrument
A brass instrument will last you a lifetime if you look after it — and most of the damage I see happens when the instrument is out of its case, not while it’s being played. Instruments dent and scratch easily, so treat every moment out of the case as a moment of risk. If you set your trombone down, make sure it’s somewhere it can’t be knocked over, and get in the habit of pulling it out last and packing it away first when you’re setting up or tearing down for rehearsal — before you touch music stands or chairs. A small trick that saves a lot of grief: point one leg of your music stand toward the instrument, so if the stand goes over, it can’t fall straight onto the horn.
Like anything you use every day, a trombone needs a bath now and then. Gunk builds up inside the tubing, and a dirty slide is one of the most frustrating things to play on. Flush the instrument out about once a month to keep corrosion at bay: pull the tuning slides and valves out, and soak the pieces in a lukewarm soapy bath (skip harsh detergent). Run a snake brush through each length of tubing to clear out what’s built up inside, then dry everything with a clean, soft cotton cloth before reassembling.
Once it’s back together, use a proper lubricant for each part — valve oil for valves and rotors, slide cream or oil for the trombone slide, and a lanolin-based grease for the tuning slides (not Vaseline). Go easy on the grease; too much will clog the slide rather than help it.
Everyday habits that matter
Start each session with your main tuning slide pulled out slightly — brass instruments are built sharp with the slide all the way in, so playing with it fully in will leave you sharp. When you’re done playing, though, push it back in all the way; leaving it out dries out the grease.
If a tuning slide or mouthpiece ever gets stuck, don’t try to force it. Twisting an instrument to free a stuck part is one of the fastest ways to damage it — take it to a repair tech, who has the right tools to remove it safely. And never bang your hand on the mouthpiece to try to seat it or loosen it; that’s the most common way mouthpieces end up jammed in the first place.
Between sessions, wipe fingerprints and dust off the outside with a soft, untreated cloth — never metal polish on a lacquered instrument, since the lacquer is what’s protecting it from tarnish. The acid on your skin corrodes brass over time, so a quick wipe-down after playing keeps the finish looking new for years.