1. On a large towel near a bathtub or sink completely disassemble the instrument. Place the finger buttons and valve top caps aside. It is a good idea to have some kind of container like a dish pan to put the valves, slides, bottom caps, and mouthpiece in so that nothing slides down the drain or gets lost.

2. Soak all the parts (not the valve felts) in warm (not hot), mild soapy water using dish detergent.

3. Run a cleaning snake brush through all the tubes.

4. Rinse all of the parts in clean lukewarm water, drain and dry with a lint free towel or let air-dry.

5. Reassemble the valves and top caps and finger buttons

6. Add a few drops of oil to the valves and install them taking care to put them back into the casings from which they were removed. Most have numbers on the valves to assist and rotate to lock in place.

7. Using slide grease or a small amount of vasoline, grease the main tuning, 1st, 2nd, and 3rd slides and put back into the horn. Wipe any extra grease off with a paper towel.