1, the product should be used in contact with the mouth, only single use, so as to avoid cross infection
2. Before each use, it should be confirmed that there is no foreign body in the mouth bite and breathing trainer
3. After each use, pull out the bite part and clean it with running water. Do not use microwave oven or boiling water to soak
4, the flow should increase slowly with the practice situation, should not increase too much, otherwise it is easy to cause bodyload