2. After use, clean the tension rope with clean water, and do not contact with alcohol, gasoline, kerosene, banana water and other chemical agents;
3. When using the door buckle, make sure that the gap of the door will not let the door buckle fall off, and do not fix it on sharp objects;
4. The extension length limit of the tension rope is 6-8 times. It is recommended to use it within 3 times.