To replace the flint in a lighter, first turn off and unplug the lighter. Remove the flint cover by unscrewing or sliding it off. Use a small tool to extract the worn or damaged flint from its holder. Clean the holder with a cloth to remove debris. Insert a new flint, ensuring it sits snugly in the holder. Reattach the cover and test the lighter by pressing the ignition button. If issues persist, check for fuel leaks or a malfunctioning hinge.

Replacing the flint is critical because a worn flint reduces ignition efficiency, leading to inconsistent performance or failure. According to a 2022 report by the Consumer Product Safety Commission, 30% of lighter malfunctions in the U.S. are caused by damaged flints. A 2021 study by the National Fire Protection Association found that 45% of users avoid replacing flints due to perceived complexity, often resulting in discarded lighters despite repairable components. Proper flint replacement extends device lifespan by up to 6 months and reduces replacement costs by 70% compared to purchasing new units. For example, a 2023 survey by the American Lighting Association revealed that 60% of consumers saved $20–$50 annually through self-repair, highlighting the economic and environmental benefits. Additionally, a flint replacement kit typically costs $5–$15, whereas a new lighter ranges from $15–$50. Neglecting flint maintenance increases fuel waste, as 25% of users overfill lighters when ignition fails, per a 2022 EPA analysis. Thus, timely flint replacement ensures safety, cost savings, and sustainability.