As most posters have said, drilling a hole is a good way to get the CA to wick up on the hinge and give you good bonding between the hinge and the balsa.

Some hinges come slotted, that is they have a slot that would sort of act as the drilled hole and allow wicking up into that slot.

No matter what method you choose, drilling or using slotted CA hinges, there are some points that you should remember:

1. Never NEVER apply CA twice on the same side. Drip 4 or so drops of CA on one side and let it set. Flip the surface (aileron, rudder, elevator.. whatever) over and do the same to the other side. DO NOT re-CA a hinge after you have already applied the CA. This will sort of de-bond the CA and will cause a failure. It happened to me on my Tiger 60. I ended up removing the ailerons and re-hinging it in different places, this time, following the instructions that my instructor gave me.

2. Pin the CA hinges in the center then pass the hinge in the slot up to the pin. Then slide the other side up to the pin. The pin will insure that the hinge goes in all the way. Pull out the pin when satisfied then apply the CA.

Good luck.