Thus far been I've been unable to find a definitive answer as to how to refill it. On the underside are two screws - The first has a spring attatched (interior) that holds a tiny piece of flint and the second screw opens to a casing of, I think cotton wool.
Do I need to pour lighter fluid onto the wool, buy a new flint or both...or neither?
this lighter works just like a zippo, you pour the lighter fluid in the larger screw hole, the other will hold a flint you can actually use zippo flint in it as well, (i have tested this), but if you can click it and a spark comes then you don't need new flint. fill the cotton with lighter fluid until fully saturated, don't over fill you would just be wasting fluid.