Sparking fire-starters are a mainstay of wilderness survival kits. They are rugged, waterproof, and have the potential to light thousands of fires. They aren’t terribly expensive and you can find one of just about any size or form-factor from keychain-sized models to large, purpose-built versions. For all their virtues, lighting a fire with them can be tougher than you might think. Today I will offer a few hard-won tips for using sparking fire-starters.