Piston brass instruments — including trumpet, cornet, baritone, euphonium, and tuba — share a common family of care requirements. Keep the valves moving freely, keep the slides lubricated, and clean the instrument regularly, and it will reward you with reliable, responsive playing for years.
Valve Care
Valves are the heart of a piston brass instrument. Oil them regularly — for most players, this means every time you play. Use a quality valve oil: remove each valve one at a time, apply a few drops to the valve casing, and replace it carefully in the correct position (valves are numbered and must go back in the right slot in the right orientation).
If a valve feels sluggish even after oiling, it may need to be cleaned. Remove the valve and rinse it in warm water to remove old oil residue and buildup before re-oiling.
Slide Care
Slides should move freely and be greased regularly. Use slide grease (not valve oil — the consistency is different) on the main tuning slide and any slides you move regularly. Slides that are left dry and unused can seize, requiring a technician to remove them without damage.
Emptying the Water Keys
During playing, condensation collects in the tubing. Open the water key (spit valve) and gently blow the moisture out regularly. This keeps the instrument responsive and prevents water from pooling in awkward places.
Regular Cleaning
A full bath — removing all slides and valves, soaking the body in lukewarm soapy water, and running a flexible brush through the tubing — should be done every few months. After cleaning, dry everything thoroughly before re-lubricating and reassembling.