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Oiling the Valves 
- Trumpet with sticky valves
- Valve Oil
- Oil Rag
Procedure for each valve to be oiled:
- Unscrew the top valve cap.
- Gently remove the valve from the casing. This is a very sensitive part of the instrument, any scraping or denting will impair the valve's function!
- Using the oil rag, wipe down the valve to remove any accumulated dirt/gunk and the old oil.
- Apply plenty of valve oil to the clean valve, careful not to drip extra oil on your nice clothes or good carpet.
- Gently replace the valve into the valve casing.
- Rotate the valve in the casing to make sure oil is spread evenly across the piston's surface.
- Align the valve guides with the casing (usually this means with the stamped number facing the mouthpiece). Typically they "click" when they're in the right spot.
- Thread and tighten the top valve cap.
- Repeat on the other two valves.
Greasing the Slides 
Cleaning the Mouthpiece 
Cleaning a trumpet mouthpiece is one of the easiest steps in cleaning the instrument.
- Mouthpiece to be cleaned.
- Mouthpiece brush.
- Run the mouthpiece under warm water or let sit in warm soapy water.
- Scrub the inside of the mouthpiece with the mouthpiece brush.