1. Disconnect the mouthpiece from the trumpet. This will give you better access to the marble.
2. Find a can of compressed air. You can find these at most hardware stores.
3. Point the compressed air at the marble and blast it out of the trumpet.** Be sure to hold the trumpet securely so that it doesn't fly out of your hands.
Method 2: Snake
1. Find a small, flexible snake. You can use a plumber's snake or a piece of wire.
2. Insert the snake into the trumpet and gently push it down until you reach the marble.**
3. Once you have reached the marble, use the snake to dislodge it and pull it out of the trumpet.** Be careful not to scratch the inside of the trumpet.
Method 3: Hot Water
1. Fill a sink with hot water. The water should be hot enough to dissolve the marble.
2. Place the trumpet in the sink and let it soak for several minutes.**
3. Remove the trumpet from the sink and use a soft cloth to wipe away any remaining marble.** Be careful not to burn yourself.
Note: If you are unable to remove the marble using one of these methods, you may need to take the trumpet to a professional repair shop.