Locate the gas fill hole on the back or bottom of your Bernzomatic lighter, depending on the model.
Remove the cap of your Bernzomatic butane canister. Invert the canister and insert the tip of the gas nozzle into the gas fill hole. Press down on the butane canister and fill until a small amount of liquid shoots out of the gas fill hole.
Store the gas cylinder in a safe location, out of the reach of children and pets and away from extreme heat or sources of fire or sparks.
Position the lighter close to the material or source of gas (such as a pilot light or grill) that you need to light.
Hold the lighter in your hand with the large gray switch facing upward. To ignite the lighter flame, press down on the raised portion of the switch with your thumb.
Release the button as soon as the flame starts.
Hold the lighter upright and check the level of liquid that appears in the window at the bottom front of the lighter. If it reaches halfway up the window or lower and you wish to continue using your lighter, add more fuel according to the directions in Steps 1 and 2.
Store the lighter in a safe place, making sure that nothing rests on (or can fall on top of) the top gray button. Keep it out of the reach of children and pets and away from sparks, fire and extreme heat.