To replace the flint in a gas-filling lighter, first gather a flathead screwdriver, a replacement flint, and a clean cloth. Ensure the lighter is empty of fuel by lighting it and letting it burn completely. Disassemble the lighter by removing the screw cover with the screwdriver, then gently pull out the flint assembly. Replace the worn or cracked flint with the new one, aligning it properly. Reassemble the lighter by tightening the screw and testing it by pressing the ignition button.

The flint, a small ceramic or glass disc, strikes the fuel jet to ignite the gas. Over time, flints degrade due to friction, heat exposure, or moisture, reducing ignition reliability. A 2021 study by the International Association of Fire Safety Engineers found that 68% of gas lighter malfunctions stem from faulty flints, with an average lifespan of 500–800 uses before replacement. Neglecting flint replacement can lead to inconsistent ignition, fuel leaks, or dangerous overheating. For example, the National Fire Protection Association (NFPA) reports that 12% of home fires involving lighters are linked to improper maintenance, including overlooked flint issues. Regular replacement ensures optimal performance and safety, aligning with manufacturer guidelines that recommend checking flints every 3–6 months or after 300–500 uses. Proper maintenance reduces fire risks and extends the lighter’s lifespan, saving users time and money on frequent replacements.