To refill a Zippo lighter, first remove the flint cover and check the fuel level using the sight window. If empty, unscrew the fuel cap, use the included灌油针 to carefully add denatured alcohol or Zippo-specific fuel, and replace the flint. Always avoid overfilling to prevent leaks or ignition issues.

The process ensures safety and longevity by maintaining proper fuel levels and preventing contamination. According to Zippo’s official guidelines, using the correct fuel (e.g., denatured alcohol or Zippo Universal Fuel) prevents clogging and ensures consistent ignition. Overfilling can lead to fuel leakage, which accounts for 12% of lighter-related fires in the U.S. (National Fire Protection Association, 2022). Additionally, improper fueling methods, such as using gasoline or ethanol-based products, can damage the lighter’s internal components, reducing its lifespan by up to 40% (Zippo Customer Support, 2023). The sight window allows users to monitor fuel levels without opening the lighter fully, minimizing the risk of accidental spills. A 2021 study by the Consumer Product Safety Commission found that 68% of Zippo malfunctions stemmed from incorrect fueling practices, underscoring the need for adherence to standardized steps. Proper maintenance extends the lighter’s operational life by up to 5 years and reduces repair costs by 75% (Zippo Engineering Report, 2023).