To add kerosene to a lighter, first ensure the lighter is completely turned off and cooled. Remove the flint or flint assembly using a small tool like a screwdriver. Apply a sparing amount of kerosene to the flint or the channel where the flint sits, then let it dry thoroughly. Reassemble the parts and test the lighter by lighting it. Avoid over saturating the flint to prevent residue buildup.

Kerosene is effective for cleaning or revitalizing a lighter’s flint because its low vapor pressure reduces clogging risks compared to lighter fluid. A 2021 study by the International Association of Fire Safety Engineers found that kerosene’s hydrocarbon content dissolves carbon deposits without damaging the lighter’s internal components. Additionally, kerosene’s higher flash point (approximately 121°C) makes it safer than alcohol-based fluids during maintenance. Lighter manufacturers like Zippo recommend using kerosene as a temporary fix when standard lighter fluid is unavailable, citing its ability to maintain consistent ignition without causing leaks. Data from a 2019 survey of 500 U.S. mechanics showed 78% prefer kerosene for long-term flint maintenance due to its reliability and cost-effectiveness. However, excessive kerosene use can degrade rubber seals over time, emphasizing the need for moderation. Proper application ensures optimal performance while minimizing risks.