How can I make my Zippo insert fit more snugly?

My insert for my new Zippo lighter moves up little by little during normal use. I don't really do tricks with the lighter but it is a bit annoying to have to push the insert back down whenever I open my lighter. Can anyone help?|||send it back to the ZIPPO factory. they actually guarantee their lighters for life and will fix it for free. of course you will have to pay to ship it to them. try googling zippo to see where they're located. near Pittsburgh, Pa. i think.