1. Fill both foamer bottles with 800 milliliters of water./p>
2. In one of the foamers, fill remaining with Stars.
3. In the other foamer, fill the remaining with Stripes.
4. Set adjustment knob on top of foamers to minimum, this will conserve soap usage and frequency of refills. If needed tighten knob toward plus to increase foam thickness and performance for extra dirty jobs or road film that has baked on for a long period of time.