1. If the pen tip is damaged, the paper will be scratched even if the water is not stopped. There is a suggestion: bend the nib upward and smooth it, and make it into an artistic pen directly, so that you can practice writing.

2. If the pen tip is not damaged, only the water is cut off: try to close the parting line between the pen tip and the root, which can be clamped with a vise and then moved in the opposite direction, so as to close the parting line. It should solve the problem, but it can't compare with the new pen.