If you have a loose arm, you’ll have to take it apart to access the areas where you need to apply glue.

Using a bamboo stick (or any stick), apply super glue to the tip to spread it evenly against the ball or peg joint.

After you finish, wait for it to dry before you connect any parts to it.

When the super glue dries up, it may leave white marks. This means there's too much glue, so try not to apply too much.

If you get glue on your fingers, apply soap and warm water to them. This will cause the glue to be easier to remove.