1. Push the button on the pen to open the wick holder
2. Insert the wick into the holder until 25mm of wick remains outside the pen
3. Light the wick by holding a flame under it for up to 20 seconds.
Note: Allow the wick to burn for another 10 seconds and then blow the flame out. If the lighting procedure has worked there should be continuous stream of smoke coming from the wick. The tip of the wick should glow orange if correctly lit.
You can gently blow on the tip to increase the burn.
4. The Smoke Pen is ready to use to detect air flow direction and gas spillage