Abstract: The invention relates to a tool for generating steam and combustion gases for. The tool is configured to enhance the longevity of its ignitor. The tool may have the ignitor recessed in but open to a wall of the tool's combustion chamber, to thereby protect the ignitor from flame impingement during use. The tool may alternately or in addition have passageways for inputs of air, fuel and/or water extending alongside and annularly around the ignitor, to thereby act to cool the ignitor during use.