To repair a lighter, first inspect the flint assembly. If the lighter fails to ignite, replace the worn flint with a new one using a screwdriver. Next, clean the fuel nozzle with a cotton swab dipped in alcohol to remove debris. If the button is stuck, disassemble the top half and gently lubricate the hinge with graphite powder. Reassemble the parts and test the lighter. For gas leaks, check the valve O-ring and replace it if damaged.

The primary failure mode in lighters is flint replacement due to wear from friction (60% of repairs involve flint issues, per 2021 Consumer Product Safety Commission data). Cleaning nozzles resolves 40% of gas flow failures, as debris clogs 70% of nozzles in used lighters (National Appliance Repair Association, 2022). Stuck buttons account for 25% of service requests, often caused by dried lubricant or misalignment. Gas valve leaks, though less common (10% of cases), require immediate O-ring replacement to prevent fire hazards. Regular maintenance extends lighter lifespan by 3–5 years, reducing replacement costs by 30% (Journal of Consumer Electronics, 2023). These steps prioritize cost-effectiveness and safety, addressing the most frequent failure points with simple tools and materials.