We're sorry to hear you didn't have the experience you expected, Stephen and want to assure you that we have many quality checks to ensure you get the amount listed on the label. We hope it helps to know, this is typically how aerosol containers are designed. The propellant that dispenses the product is a gas. We use 100% natural nitrogen as the propellant, and the space above the liquid is occupied by the nitrogen. The container is 60% liquid and 40% nitrogen to allow the nitrogen to adequately dispense the volume of liquid. The weight listed on the package reflects the fill level of the liquid in the container. We'd like to help, as well as share your experience with our Quality Team. When you have a chance, please get in touch with us at (800) 308-3279.