Mop head dropped it. How can I put it back?

The method of putting it back is as follows:

1. If the mop head falls off due to internal rupture, the middle part of the mop can be fixed with super glue.

2. If the internal screw is damaged, buy an identical screw and put it back, so that mop head will not fall.

3. If the internal screw is damaged, it is recommended to buy an identical screw and put it back, so that mop head will not fall.