Is your Zippo lighter jammed? Try this.

Check to see if the flint is visible under the flint wheel. If so, try using a very thin piece of metal and insert it under the wheel - see if that will loosen it. To unplug a jammed flint tube, remove the flint spring and then try sliding an unfolded paper clip or a very small drill bit down the flint tube and wiggling it around. Turn the lighting mechanism right side up and tap it firmly on a hard, protected surface to remove loosened material.