Be aware, too, that not all scrapers are created equal. Some produce more/larger sparks.

Yours appears to come with a smooth-edged scraping tool, whereas many come with a similarly-sized length of hacksaw blade, which produces better results for me (but it tends to "chew up" the rod). Knife blade will work, but you can imagine what it can do to the blade edge (I avoid). Using sharp edge of rock as scraper can produce useable sparks in a pinch.

The scraper-to-rod angle, and scraper-to-rod pressure also impact results.

Practice, practice, practice. <img src="/images/graemlins/smirk.gif" alt="" />