2。 The backlog causes the water to dry up, stagnate and cut off.
3。 The beads used to write in front of the pen end are missing.
I have also encountered many situations where water is cut off. These are my opinions.
I hope it helps you.
For the record, I also sent an anonymous one. If you want to choose mine, please choose this one.
Just opened. Thank you for your cooperation in typing hard.