7. Do I need to hold the sprayer button to keep the sprayer on? Customer Service February 25, 2020 15:24 Updated Follow No. The sprayer button can be pressed once to turn on and once to turn off. Related articles 8. Can I store my product bottles on the base unit when not in use? 6. Why should I purge my device after each use? 10. What if I see residue build up in my liquid lines? 14. What is the correct PPE to wear while using the ByoPlanet® Electrostatic Spray System? 5. What does priming the sprayer mean?