There are several types of doorknobs available for installation in the interior doors of a home, but one of the most common varieties is the push-button-locking type of doorknob. The problem with push-button locks is that dirt can get inside, jamming the locking mechanism or causing the button to stick. The lock may jam when you least expect it, meaning you have to take the doorknob apart to open the door. Push-button doorknobs are simple to take apart and clean or replace.
Open the door and inspect the strike plate if you are having issues with the door closing properly. Tighten the screws down on the strike plate.
Remove the screws from the knob plate on each end of the door. If there isn't a screw on the plate, locate the hole at the striker plate, on the shank of the doorknob. Insert a screwdriver into the hole. Pull on the doorknob to remove it from the shank. Remove the plate from the door and remove the screws.
Tug on the doorknob on each side to pull the pieces apart.
Remove the spring and the button from the doorknob by pressing a screwdriver down onto the push button. Clean the pieces.
Reassemble the doorknob and place it back on the door.