How do I remove Zippo flints?

I hate to sound like a newb but how do you remove a Zippo flint? I took out the screw and tapped the inside thing gently on a table like zippo.com says. can anybody help me?|||Yep thats how you do it. Sometimes you have to give the little wheel thing a spin. If you do that its gone. I usually stick an extra one right under the cotton pad at the bottom|||if you aren't getting a spark at the wheel, the flint is done. even if it isn't, you can just put another one in and return the screw.|||Prolly just don't got one. Put another one in and give it a shot.|||It's probably used up- there is no flint left. Just drop in a new one and replace the screw. It should work fine.