Just like gas for your car, there are higher and lower grade butane lighter refill fuels on the market. The difference is the purity or refinement of the butane gas. The cheap butane is unrefined and therefore has many impurities that will clog premium lighters. Most butane lighter refill problems are related to the use of poor quality butane fuel. That's why Cuban Crafters only sells premium multi-refined butane lighter fuel and we recommended it for all butane lighters. It’s 5 times refined which reduces contaminants that cause clogged burner valves and misfires. Best of all our online prices are the lowest available.