How do you refill a Ronxs torch lighter?

Refilling a Ronxs torch lighter is a relatively straightforward process. Here are the general steps to follow:
First, make sure the lighter is completely empty of butane. You can tell this by pressing the refill valve with a small screwdriver or other tool. If you hear a hissing sound or no sound at all, the lighter is empty.
Locate the refill valve on the bottom of the lighter. It should be a small, circular hole.
Hold the lighter upside down and insert the tip of the butane canister into the refill valve. Make sure the canister is straight and fully inserted.
Press down on the canister firmly to release the butane. You should hear a hissing sound as the butane enters the lighter. Keep pressing down for several seconds to ensure the lighter is fully refilled.
Once the lighter is full, remove the butane canister and wait a few seconds for the gas to settle.
Test the lighter to make sure it is working properly. If it doesn't light, try adjusting the flame height using the flame adjustment dial on the side of the lighter.
Dispose of the empty butane canister in a safe manner according to local regulations.