This resource covers two aspects relating to the butane lighters.
The quality of the butane
- The quality of the butane
- The correct technique for using the butane to fill your lighter
The quality of the butane relates to how well filtered it is, the higher the quality the less contaminants are left to clog up the lighter jets during use.
Below is a table of the residual PPM contaminants in butane by brand, the lower the PPM the less contaminants there are to clog up your lighter.
Notice how much the PPM jumps when you get to 'Ronson', this is why it is best to avoid low quality fuel like 'Ronson'.
The above table was captured from a Skunk Pharm Research article about BHO
*Mercaptans are odorants added to the butane to assist in its detection.
The correct technique for using the butane to refill a lighter
Step 1. First locate the refill nozzle and flame adjustment screw (photo 1).
Step 2. Drain all existing fuel from the lighter using a pen, small screwdriver, or some other small pointed object by depressing the fuel refill nozzle (photo 2). I have found that turning the lighter right-side-up (with refill nozzle pointing toward the ground) helps get the last bit of air out. ENSURE YOU DO THIS OUTSIDE OR IN A WELL VENTILATED AREA and ensure the refill nozzle is directed away from your body or face.
Step 3. Turn the flame adjustment screw all the way clockwise to shut off all fuel flow (photo 3). You should see a plus (+) or minus (-) sign near the adjustment screw, which corresponds to open and shut, respectively.
Step 4. With the fuel refill nozzle on your lighter pointing up, press the can of fuel straight down into the nozzle. Be patient, a lighter does not become refilled in 2 seconds. Take your time. It will take 15-seconds or so to fill the lighter chamber. DO NOT pump the fuel can into the lighter. On some of the less expensive lighters, this could cause the tank to rupture.
Step 5. After refilling, let the lighter rest until it reaches room temperature. The fuel is cold when refilling and will expand as it reaches normal temperatures. You can also wrap your hand around the lighter to allow your hand temperature to warm the fuel.
Step 6. Turn the flame adjustment screw ½-turn counter clockwise(toward the + position) and try to light the lighter. Keep turning the screw open in small increments until the lighter lights and is at the desired flame height. Make minor adjustments as necessary.
How to Properly Fill a Lighter with Butane #Cigar101 - Famous Smoke Shop (YTube 3:03mins)
Butane Quality / Lighter Refuelling Technique
Why you should use high quality butane and how to fill a lighter correctly