I have 4 Zippos. One has always been a spare. I use my SF and my 1982 solid brass. The 4th is also a spare. Number 4 lost its "hat" some time ago. Recently my brass lost its hat. So, I switched out from the spare to the brass. Turns out this insert is brass, it may well be the original for the brass lighter. So, I put the insert in, fill it, spin the wheel...nothing. After maybe 20 tries I got one light. So, I thought bad flint? Replaced the flint. Still does not want to light. I fiddled with the wick. Still won't light. Put in a NEW wick...still won't light. Filled it up tonight before going to town. Got one light out of, oh, maybe, 30 tries. I've never had a Zippo just refuse to light. Any ideas? It's my Fav, equaled only by my SF.