I'll try to help..
1. Cut a little of the white end of the pipe
2. Press the clutch to shoot
3. While the clutch is pressed, insert the pipe into the firing chamber and press firmly until the pipe gets stuck. Then, release the clutch
4. Remove the skewer under the handle to pierce the cut end of the pipe so that it has a hole
5. Clean the skewer pin and reinstall it in the gun for next use
6. Press the handle slowly to the maximum, then release the handle thoroughly, and pull the handle back slowly. This is so that the gun releases the melted tube
Write your questions below if you are still having trouble using it.