I use a syringe with a needle to fill mine. Itīs not a good idea to fill it to the top as the striker displaces some fluid. I keep the fluid level about 2 mm below the thread.
If you put the flame out when the fuel is gone the wick should stay good. I hold my match with the rod vertically and strike upwards. That works pretty well.
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If it isnīt broken, it doesnīt have enough features yet.