1. Disassemble the trombone. Remove the slide, mouthpiece, and water key.
2. Clean the slide. With a soft cloth, begin to swab around the inside of the slide to wipe off any dirt or grime. You may also choose to use cleaning fluid and a snake brush to thoroughly remove any built-up residue.
3. Clean the mouthpiece. Run the mouthpiece under warm water and then use a soft cloth to clean the inside and outside of the mouthpiece.
4. Clean the water key. Use a cotton swab to clean the water key and remove any dirt or debris that may be blocking it.
5. Reassemble the trombone. Put the slide, mouthpiece, and water key back together.
You should clean your trombone regularly, at least once a week, or after each use, to keep it in good condition and ensure optimal performance.