Why did the thing in between my mouse left clik and right clik thing stop working?

Question

why did my mouse's scroller thin stop working ?

Answer 1

Could it be dirty?  No offense.  You have to take out the bottom and blow, pull wound up hair and c**p from underneath (wound up on the rollers) once in awhile.  Throw a little baby oil on the ball and put it back together.  Should work fine then!!!!

Answer 2

could be dirty tear it apart and clean it

Answer 3

That happened to my old one too.  Probably because I got ticked off and threw it across the room.