The AVA Foam Cannon Creates a layer of long-lasting foam that clings to every surface. Exactly how much foam the cannon sprays can be adjusted. It utilizes a high-quality stainless steel mesh filter to mix detergent, water and air. Bottles fit directly onto the foam cannon. This foam cannon works with bar machines. The thicker the detergent, the higher setting on the Foam Cannon is needed for a proper mix. The Water flow from the pressure washer greatly impacts the mix ratio. Set the mix to a lower setting with smaller pressure washer models. Due to these variables, it’s not possible to set an exact mixing ratio. The general rule is: Use the lowest possible setting that gives a desirable result. Always spray a while with the bottle detached after cleaning, to properly rinse the inside of the Foam Cannon and prevent detergent from drying and clogging the product.