When I refill my Zippo it works right after I put the fluid in but does not work about two days or so later even though I havent used it but one flick after I refilled it?

When I refill my Zippo it works right after I put the fluid in but does not work about two days or so later even though I havent used it but one flick after I refilled it?
if you look at the bottom of your Zippo there will be a series of horizontal lines one line is a cheap version and five is the most expensive,if there are no lines you have a cheap copy and your problem is most likely caused by evaporation due to heat in your pocket