For squeaky doors: Just lifting the hinge pin and squirting a little oil into the hinge will work for the short run, but the squeaking will inevitably return. To ensure long-lasting silence, tap the hinge pin out of the hinge and coat the pin with white lithium grease. Tap the pin back in place and test the door. The door should open and close silently, although you may have to lubricate both top and bottom hinges.
There’s no way to deny that a squeaky door is a major irritation to your general existence. If you’ve been avoiding the fix because you don’t have any WD-40 handy, today is your lucky day! It turns out you can use a variety of household items to lubricate those hinges and silence the squeak.