1. Read the specific guidelines on packaging for your target animal.
2. Find an active tunnel and clear one opening. Make the hole large enough to insert the gasser. Ensure all other tunnel openings are sealed.
3. Remove the top lid to expose the scratch surface on the cap. Twist and remove the inside cap to expose the black button.
4. Then, gently press the black button against the scratch sticker on cap and strike it quickly away from your body.
5. Insert the gasser stick into the hole with the lit end first. Immediately cover the hole with rock, soil, or other nonflammable materials without smothering the cartridge.