The PTFE/teflon tube keep coming out from the pneumatic connector.
1) Printing speed to high, nozzle temperature not high enough
If you are using our filament, kindly use 200°c or 210°c for the nozzle and 50 mm/s for the general printing speed. It should help to solve the problem.
2) Pneumatic connector broken
You can get the Pneumatic connector at our shop.