Just thought I'd weigh in on the lighters if anyone is having issues like I did. I live at 5,700' elevation, so this may be a contributing factor.
I ordered two. Opened the first and filled with Xikar. Lighter would only light one out every 10 times. If that. When it did, it would stay lit for almost a second after releasing the lever, hissing butane for even longer. Opened the second one and loaded with Colibri fuel (both fuels are triple refined). Same exact problems. Yes, I did purge both units before filling.
I opened the lighters back up, removed the metal clasp on the inner "fuel cell", and adjusted the flame control an extra half turn down by lifting the control knob above the gear wheel and rotating right (without rotating the flame control gear). Then reseated the knob on the wheel and rotated all the way left. Then reattached the metal clasp and reinserted into the lighter.
This resolved all my issues with both lighters. They now light 9 out 10 times (the one time it doesn't light, it does the second try). They both now go out as soon as I release the lever. No more escaping butane either. I am super pleased I bought two of these. I do a lot of short flights, so one of these will be permanently store with my travel gear while the other will enter my regular lighter rotation. Can't wait to test it's cold weather reliability where most of my other single/double torches fail.