Things You'll Need
Instructions
Hold the Zippo lighter in one hand and use the other hand to pull the outside cover off of the lighter.
Remove the screw from the bottom of the lighter's insert that was removed from the case. You will need to use a tiny flat-head screwdriver. A spring will pop out of the tube if you pull it apart too fast, so remove the screw slowly from the insert.
Turn the lighter over and tap it lightly on a flat surface which will cause the old flint to fall out.
Replace the old flint with a new flint by sliding the new flint into the long tube inside the lighter.
Replace the spring with the brass side inserted first. Using the screw driver, replace the screw.
Slide the outer casing back onto the lighter's interior body.