Found a way. Used Fluid Film and a spray extension. A small shot aimed at the rear of the fan motor through the rubber vent tube. Access directly below hood hinge, you'll see a dimple in the inner fender, pull the rubber vent tube and give it a shot.
Squeak is gone. Fan works fine, always did, just needed to cure the intermittent squeak. Might have to do it again in future but for now I'm happy.