Something I just learned is to check and make sure your knife, if that's what your using to spark with, will work. I just bought my first striker at Walmart, and it was a Coghlan(so I followed Neanderthal's advice) and tried to spark the shavings with an old Norwegian laminated blade knife that sits on my workbench. Nothing. Tried my Spyderco Native(S-30V stainless) and it worked fine. The laminated blade on the Norwegian uses a hard steel core sandwiched between two softer steel layers. The soft layers were too soft to spark with. Pays to make sure, I suspect, especially if you carry an older carbon steel or Puuko or Saami blade. By the way, cotton balls rubbed with vaseline work great. Used them a couple of times while out hiking to build my lunch fire.