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When you're finished scrubbing, trade the foam brush back for the spray wand, and take a lap around your car to rinse all of the soap from your car. Again, it's best to work quickly to prevent a soapy film from developing on your car.  Make sure that the machine is on the rinse setting. At this point, if a film has developed anywhere on your car, wipe it away with a rag and rinse the area thoroughly. If the wax setting is available at the station, take a final lap around your car with the spray wand in order to apply a fine layer of wax to the body of your vehicle. This will help seal in the clean surface of the body while protecting the paint from dirt and salt.   Do not wax the floor mats. If the “Wax” setting is unavailable, skip directly to the next step. At this point, you are finished using the spray wand, so it's time to return it to the place where you found it at the station. If you've opted to wash your floor mats, be sure to dry them thoroughly with a rag or towel before returning them to the interior of the car.
Use the spray wand to rinse all of the suds from your car. Wax your car. Return the spray wand. Dry your floor mats.