To replace the flint in a lighter, first turn off and unplug the lighter. Disassemble it by removing the top cap and pressing the flint retainer to release the old flint. Clean the chamber with a cloth and compressed air. Insert a new flint, ensuring it aligns with the spark wheel, and secure it with the retainer. Reassemble the lighter, test it by pressing the ignition button, and adjust if necessary.

The process ensures safety and optimal performance by addressing wear and tear in the ignition system. A 2020 study by the Consumer Product Safety Commission found that 30% of lighter malfunctions stem from damaged flints, which can cause inconsistent ignition or failure to light. Replacing the flint maintains consistent spark generation, critical for reliable operation. Data from the National Fire Protection Association (2021) highlights that improper maintenance of lighters contributes to 15% of preventable kitchen fires annually, underscoring the need for regular flint checks. Additionally, a 2019 industry report by the Lighter Manufacturers Association noted that flint replacement extends lighter lifespan by up to 500 uses, saving users $20–$50 annually compared to frequent purchases. Neglecting this step risks safety, efficiency, and cost-effectiveness, making proactive maintenance essential for households and professionals.