Also, bear in mind that immediately after refilling the lighter, the butane is extremely cold. You need to give it time to warm up. then adjust the flame. BTW, the most economical fuel I've found that is comparable to, or even surpasses, Colibri fuel is called LAVA. It's quintuple refined, comes in a large can (5.3 ozs.) so you have plenty of pressure to direct fuel in the lighter, and to me it burns even cleaner than Colibri or any other fuel I've used. Just FYI.....