Like I said it’s been a while since I’ve looked at one but here’s some tips from another site…
My Fireball/Powerspin/Raider/RBII won’t come back
Oil: The yo-yo needs oil to fill the air gap between the axle and transaxle.
String: Check to be sure the string is looped three times on the Fireball or Powerspin. Also, old, thin strings do not work as well as new, fluffy ones.
String Gap: The string gap may be too wide. Be sure your yo-yo is screwed together all the way. It is also sometimes possible to knock or pull the axle nut from its plastic housing inside the yo-yo. If this has happened, it can sometimes be fixed by firmly pushing the two yo-halves together to pop it back into place.
Skill: These aren’t beginner yo-yos. If you haven’t yet mastered a strong throw, you may simply need to practice or start out with a Brain yo-yo to develop your skills.
I would take a close look at the bolt popping out thing. And the wrap count on the transaxle. Maybe the oil…but you just got it…you can use some 3in1 or light oil with no issue