Hi Everyone,
After WD-40-ing the fan April 9'th, I can say it lasted until today.
Also, it is not that the bearing is loose, it is the fan bearing is getting sticky.
I'm still awaiting the Aliexpress replacement fan, so I just applied the 'Lucas White Lithium Grease' I purchased.
This stuff:
Lucas White Lithium GreaseI can say the stuff's viscosity is perfect for small electronic plastic gears and bearings. It has the consistency similar to a thin mayonnaise. It will stay where you put it and it wont slow down fan bearings like a thick sticky 'Vaseline' type of grease.
I'll report how long this stuff lasts in my fan...
(Man, the fan is now so quiet. I don't mean slower as you can tell RPM by pitch, I mean just soooo quiet and smooth sounding. The previous WD-40 temporary fix had a cold metallic mechanical metal-on-metal sound to it.)