What is the best practice for post-fire cleaning in a kitchen employing Class K extinguishers?

• A. Allow cooling, safely remove residues, clean the area according to manufacturer guidelines, and arrange recharging
• B. Immediately repaint surfaces
• C. Vacuum the area and resume operation
• D. Remove extinguisher and seal area

Answer: (A)

When a Class K kitchen extinguisher has been discharged, the priority is to restore a safe, clean area and ensure the extinguisher is ready for future use. Let the cooled surfaces and grease residues settle, then carefully remove residues in accordance with the extinguisher manufacturer’s cleaning guidelines. Cleaning the area with approved cleaners helps remove the greasy film and any chemical residues left by the wet chemical agent, which is important in a kitchen where oils are constantly present and surfaces must remain safe to work on. Because Class K extinguishing agents react with fats to form a soapy layer, it’s essential to remove that residue properly to prevent slip hazards and corrosion. After cleaning, arrange for recharging the extinguisher so it is fully functional again. Repainting surfaces, vacuuming and resuming operation, or sealing off the area without addressing the residue and the extinguisher recharge would not adequately restore safety or readiness.