The PASS method.
Pull the pin – This will allow you to squeeze the handle to discharge the fire extinguisher.
Aim at the base of the fire – Aiming at the middle of the fire, will not put it out. The extinguishing agent will pass through the flames.
Squeeze the handle – This will release the pressurized extinguishing agent. Sweep from side to side
Spray the extinguisher nozzle or hose at the base of the fire, moving carefully from side to side. Continue until the fire is extinguished.
When the fire goes out, keep an eye on the area, and be prepared to repeat the process if the fire re-ignites. Remember, fire extinguishers are designed to put out small fires! Most portable fire extinguishers are designed to last about ten to eighteen seconds. If the fire becomes large, do not attempt to extinguish … GET OUT! When exiting, close doors behind you to slow the spread of the fire. Call 9-1-1 from a safe place.