To refill the BernzOmatic ST2200T Detail Torch, follow these steps: Turn Off the Torch: Ensure the torch is completely turned off and cooled down. Remove the Butane Cylinder: Unscrew the butane cylinder from the torch. Insert the Cylinder into the Fuel Bottle: Place the butane cylinder into the fuel bottle nozzle. Press the Fuel Bottle: Press down on the fuel bottle to inject butane into the cylinder. You should hear a hissing sound as the fuel enters the cylinder. Reattach the Cylinder to the Torch: Once the cylinder is refilled, screw it back onto the torch. Test the Torch: Turn on the torch to ensure it's working properly.