How To Use a Fire Extinguisher
First of all, keep your extinguishers where you can see and reach them easily; like near the room's exit. Not only does this make them more accessible in case of an emergency but it also keeps you near an exit if you need to escape.
To help you use your extinguisher, remember the acronym PASS.
P. A. S. S.
Pull the extinguisher's safety pin.
Aim the chemical at the source of the flames rather than at the flames themselves, standing at least 6 feet from the fire (or as directed on the extinguisher's label).
Squeeze the trigger and hold it, keeping the extinguisher upright.
Sweep the source of the flames until the extinguisher runs dry.
After you have used your extinguisher, even if it is not completely empty, you must replace it or refill it right away.