I have been getting the cricket noise starting from my blower motor the past couple of days. Removal of the cabin filter revealed that the gasket was not properly reinstalled last time the dealer changed it. I was able to fix it by turning off recirc mode on the HVAC controls, and using a flashlight and a few drops of turbine oil I found a local hardware store the problem was solved. This is the oil I used:
For those of you considering the WD-40 route I would highly recommend this. Costs about $2 and has an extendable spout to apply a few drops directly to the bearing, without coating the air box in oil.