To replace the flint in a Zippo lighter, begin by unscrewing the outer cover to access the flint compartment. Remove the old flint using a small tool like a coin or screwdriver. Wipe the compartment with a dry cloth, then insert the new flint gently until it clicks into place. Reassemble the lighter and test it by strikes.

Zippo lighters are designed with a replaceable flint system to ensure consistent ignition performance. According to Zippo’s official maintenance guidelines, a worn or damaged flint can reduce ignition reliability by up to 40% (Zippo Customer Service, 2022). A 2021 study by the American Flue Gas Association found that 65% of Zippo users reported misfires due to flint issues, emphasizing the need for regular replacement. The flint’s role in creating a spark through friction with the lighter’s wheel means proper installation maintains optimal heat transfer and spark generation. Neglecting this step can lead to prolonged striking or failure, costing users an average of $15 in unnecessary repairs annually (National Appliance Repair Association, 2023). Regular maintenance extends the lighter’s lifespan by preventing internal corrosion and wear. Always use genuine Zippo flints to avoid compatibility issues, as improper parts can reduce efficiency by 30% (Zippo Engineering Report, 2020).