To Use Remember the PASS word. Keep your back to an unobstructed exit and stand six to eight feet away from the fire. S queeze and S weep. Some extinguishers may have other lever-release mechanisms. Releasing the lever will stop the discharge.
Some extinguishers have a button instead of a lever.
Watch the fire area. If the fire re-ignites, repeat the process. Always be sure the fire department inspects the fire site, even if you think you've extinguished the fire. The fire is confined to a small area and is not spreading. You have an unobstructed escape route to which the fire will not spread.