When using on a fire, all the contents of the Tundra™ Fire Extinguishing Spray should be used to help prevent the flame from re-igniting. Since cleanup of the fire extinguishing discharge is so easy, use the entire product, just to be safe. Additionally, it is recommended that you should replace your Tundra™ once you have partially used it so that you can be sure to have enough fire extinguishing spray to protect your home in the future.