a. After each use before storing or before switching chemicals, spray water through the machine for 20 seconds to rinse out the line of any leftover chemicals that may start to build up. b. Do not transport or store chemicals in the tank while connected to the sprayer. If you want to store chemicals in the tank, we recommend you purchase a tank cap and seal up the tank during transporting and storage of the sprayer. If you do not empty the tank, the user runs the risk of the liquid spilling in the case and damaging the electrical board in the unit or in the battery. c. A plugged nozzle can occur if the machine is not regularly rinsed. If you have a plugged nozzle, remove the nozzle, soak in hot, soapy water for 10 minutes, then blow out the nozzle with compressed air. Watch our video on cleaning and maintenance to see a demonstration.