k15goosefill it up, it evaporates. you also might need to repack the wick like a snake through the cotton fill. pull the guts out using tweezers- its on youtube if you need clarity.
As much as I love a good Zippo with flint/wick/fluid...I never have lighter fluid around whenever I run out and they don't make the bottom of Zippos cotton padding as thick as they used to where fluid would last over a month. But I personally recommend a Vector butane torch insert, and now Zippo makes them. (I refill it probably once a month with every day use) or my new favorite the plasma dual arc Zippo inserts. Basically the same thing as two mini tazers that make an "X" with 2 arcs. And it will light anything instantly. And is definitely wind proof. Also comes with a tiny magnetic usb to micro USB cable that fits in your wallet for charging. Def worth the $20. Also does anyone know if the plain copper selection is also an armor casing series or just the engraved ones?