Which of the following is least appropriate during nozzle cleaning?

• A. Use a soft brush
• B. Flush with water
• C. Use manufacturer-recommended cleaners
• D. Use metal brushes and picks

Answer: (D)

Keeping nozzles clean without causing damage is essential for consistent spray patterns and drift control. During cleaning, use a soft brush to remove built-up residue gently, so you don’t scratch or gouge the delicate orifice. Flushing with water helps rinse away particles and fully clear the passage after brushing. When choosing cleaners, stick with those recommended by the nozzle or pump manufacturer, since they’re chosen to be compatible with the materials and seals in your equipment and won’t cause corrosion or degradation.

Using metal brushes and picks is not appropriate because these are too abrasive for nozzle components. They can scratch, gouge, or enlarge the orifice, altering spray characteristics and weakening the nozzle. Metal debris can also break off and contaminate the spray solution or clog screens, leading to uneven coverage or leaks. After cleaning, inspect the nozzle for any sign of wear or damage and test the spray pattern to ensure it’s still producing the intended droplet size and coverage.