1. Use soapy water to detect the location of the air leak
2. Bubbles will appear at the location of the air leak
3. Wipe soapy water
4. Use a flat-shaped screwdriver to enlarge the gap (you can use a hair dryer to heat up and open the edges)
5. Spread the PVC glue evenly, heat and apply pressure to squeeze out the air in the gap (glue can be purchased at the supermarket)
6. After standing for 24 hours, use soapy water to check if there is still air leakage
