No instructions on the bottle as to how much detergent to add per volume of water.
Peter Recommends This Generac Product
I'm sorry you missed Line 12 of the Features for this product: "Your pressure washer will automatically dilute to the proper ratio",
You just put the siphon tube of your pressure washer into the bottle, or pour the detergent into your soap bottle; add your black Soap tip or twist your wand to the Mix position to apply soap. Pressure washers dilute on about a 1:10 ratio, so the 1 gallon bottle will provide 10 gallons of detergent.