Why are the three numbers of Zijin Mouse always missing?

I want to ask why the three holes of Zijin mouse always leak. It's worn out

It's normal for purple and gold mice to have holes in their bracelets. It may be that you dropped a hole while playing, or it may be worn out when you put it.

Purple mouse is a rare variety of Bodhi, and the fruit seed of Queen Sunflower is very precious, which is a kind of rosary with high Buddhist origin.