When door hinges start to squeal, you can spray some lubricant like WD-40 into the middle of the hinge to quiet them. If that doesn't work, try knocking the hinge pin up about halfway with a screwdriver and hammer, and then rubbing some lubricant like 3-in-one oil on it. Tap it back down and then move the door back and forth, and your squeak should be gone.
