Fire starters are a great way to start your fire quickly and safely. Fatwood is a thick, oily substance that collects on fireplaces, stoves, grills and other cooking surfaces. It is a natural byproduct of burning wood. The best way to remove fatwood is to simply scrape it off the surface with a metal scraper or a stiff wire brush. You can use matches to start fires for cooking, heating water, starting campfires, and even lighting candles.