How do I take door hinges that have a pivot ending with two flat cylinders apart?
If you cannot get them apart, try spraying the hinge pivot with dry silicone spray. Do not use oil based products such as WD40 or PB Blaster, as they will stain and turn black with collected dirt.  Spray with silicone, work the hinge and repeat. Hopefully it will work it's way into the pin and quiet your hinge.  Good Luck