Depending on the bow it could be cam bushings needing lubed. A good teflon based lube will work fine on them. If it's a bow with split cable harnesses it could be the little buttons that the yoke attaches to at the limb tips are rubbing the limbs too hard. Again, a little drop of lube between the button and the limb.

Maybe it's not that at all. Maybe it's the cable slide on the rod. See if you can just clean the slide and the rod with alcohol. Do not add lube to the rod. It doesn't need it.

See if this helps.