The four steps for using a fire extinguisher can be remembered by the acronym P.A.S.S. :

1. Pull the pin: This releases the locking mechanism and allows you to discharge the extinguisher.
2. Aim the nozzle at the base of the fire: Target the fuel source, not the flames, to effectively put out the fire.
3. Squeeze the handle: This releases the extinguishing agent.
4. Sweep the nozzle from side to side at the base of the fire until it is completely out

These steps ensure the fire is tackled efficiently and safely. Always stand about 8-10 feet away from the fire and move closer as it diminishes. Only attempt to use a fire extinguisher on small, contained fires with a clear exit route