1. In order to clean the water in the tube after each use of the instrument, you can wrap the cleaning stick carried by the instrument with a handkerchief or gauze. Then insert it into the tube and slowly rotate it, rubbing it up and down several times. If the mat is wet, take it off in time. The method is to use a piece of absorbent paper, sandwiched between the keys and the sound hole, hold down the keys by hand, let the paper fully contact with the mat, and suck up the water. Then put a soft cloth or clean paper between the keys and the sound hole, gently press the keys, don't use too much force, and pull the soft cloth or paper back and forth several times to make each cushion clean. If it is not cleaned for a long time, it will play the role of adhesive tape after excessive dirt accumulation, which will affect the opening and closing speed of the key. So be sure to clean it regularly, at least once a month.
2. Always check the musical instrument, and check whether the keys are abnormal and the screws are loose from top to bottom. If the screws are loose, tighten them in time to prevent them from being lost and affecting normal use. The musical instrument must be put back in the box after use, and it must not be misplaced to prevent bumping. Don't chase and fight with musical instruments.