Your Zippo may need fuel or a wick replacement .
Who cares? Ronsonal works just as well in a Zippo lighter as Zippo fuel does.
Butane
Naptha .
Less than $2 for a can.
You can be any age to buy an empty zippo. They may question you if you look really young. The best place to get one would be a corner store or some gas station, they usually don't care about age. The thing is, you can be any age to buy an empty lighter but you have to be 18 to buy the fuel for them. I live in Fl and I'm 17 and bought one. Not the fuel though, some I.D. you for fuel.
In normal disposable lighters like bic it is butane gas, in Zippo lighters you can use most liquid that lights with a spark, but most people just use zippo brand naptha fuel.
Your question is a bit ambiguous. I would say first, add fluid, make sure the fluid has soaked into the cotton, and keep the lid shut for a min before lighting. If that does not work then I would suggest moving the wick to the flint, this can be done by using a key and pushing the cotton-metal wick towards the spark end of the zippo. Suppose that does not work... you can always purchase zippo parts from a cigar shop and they will be more than willing to help you if you buy a pack of smokes from them! Last case buy a cheap zippo and put the center pice into yours... it will work fine and you will have your zippo art with a genuine zippo center! Remember if you have a problem with your official zippo, then they all have a lifetime guarantee, so you can always send it back to your regional zippo centre.
The best why to get a zippo collection appraised is go to eBay and look up each of your lighters individually, because there isn't too many zippo "experts" out there. Even if there is, they know more about what year they are and how to fix them then their value
Some people think the fumes from the Zippo fuel "mess" with the taste of the cigar. We know many people who don't feel this way too so you should give it a try yourself and form your own opinion.
Refer Lightingcatalog.com 1- 888-343-1974
im not sure if you mean taking the fluid from a regular lighter and putting that into a zippo or just simply zippo to zippo but I'll answer both. I wouldn't recomend putting normal butane lighter fluid into a zippo because it runs out really fast and makes the flame far too big to be practical. if you want to change fuel from one zippo to another simply remove the insert, peel back the first felt layer, take out the cotton from inside and putting that cotton into the other zippo. hope that helped :)