It may be caused by wrong size of the cup holder and the tube is held in the cup holder. too tightly. The cup holder size judgment: the tube should be fully held in the cup holder, but when sealing the tail, the cup holder should not affect the tube shape’s.natural change.

It may be caused by too small heating head. Just replace it with bigger heating head. How to judge the correct size of the heating head: Insert the heating head into the tube, then pull out, it will be fine if you can feel a slight suction when pulling out.

It may be caused by damage at the hole of the filling nozzle. You may fix the hole by taking out the filling nozzle. Grind the surface of it gently with water finish sand paper after fixing the aperture of the nozzle. Or the sealing ring of the filling head is damaged, just replace the sealing ring.

Jam blocked in the filling channels, mainly at the tank inlet or in the filling nozzle, just check and clean it.

At the time of filling large size and insufficient tank feeding which may cause instability of liquid level, please increase the feeding quantity or turn down the ball valve above the filling head, reset the filling time (add more filling time ) to slow down the filling.