Here are the steps: – Use Dawn dish soap and water to flush the system. – Empty out any liquid remaining in the tank, then fill it up with clean water. Examine the wand tip for sediment buildup and clean it if necessary. – Add approximately 1/4 cup of dish soap to the tank and shake it around for a few minutes before spraying it all out of the nozzle. – Use a microfiber cloth to wipe down the exterior of your sprayer, as this can better trap and hold dirt and debris than a standard rag can.