Knowing when and how to use a fire extinguisher can be crucially important. Make sure that everyone is on their way out of the house and the fire department has been called before you attempt to put out a fire with a fire extinguisher. Then, remember this word. Pass. P-A-S-S. P. Pull the pin. A. Aim at the base of the fire. S. Squeeze the trigger. Sweep back and forth, the second S, always leaving yourself a safe escape route. Be sure to check the gauge once a month to make sure that your fire extinguisher is full and if you have any questions about how to use this contact your fire department.