Unplug your refrigerator and remove all bins and food from the inside of the door.
Remove any screws from the plastic hinge cover on the top corner of the refrigerator.
Remove the cover to expose the hinge.
Tighten any loose screws with your screwdriver. For hex-head screws secure the hinges and then use a nut driver to remove the screws. If the hinges are bent out of shape, cracked or otherwise damaged beyond repair, they will need to be replaced.
Remove the screws from the metal hinge and remove the hinge from the door.
Fit new hinges over the door corner and replace the screws.