Got new heaphones from Apple after my old ones blew out, and the clicker just randomly stopped working. I can still talk into the mic, however all clicker functionality does not work
Probably pocket lint. The mic connector is at the bottom of the jack. Anything that gets in there will interfere with the mic and clicker well before it affects the headphones.
Try using an un-spooled paper clip to *gently* poke into the headphone jack and see if you can spear any lint on it.