Residue that has hardened and adhered to surfaces should be sprayed with a 50/50 solution of warm water and isopropyl alcohol.The residue should then be placed in a bag for disposal. Any loose debris/product should be initially swept or vacuumed up to minimize dust and to reduce the amount of interventive solutions that will need to be used.The extinguishing agents (sodium bicarbonate, monoammonium phosphate, potassium bicarbonate) used in dry chemical fire extinguishers leave a corrosive powdery residue that can corrode metal surfaces if left in contact for very long and should be cleaned up as soon as possible. How to Safely Clean Up Dry Chemical Fire Extinguisher Residue Also important after extinguishing the fire is properly cleaning up the fire extinguishment residue and taking the appropriate personal precautions in the process. The fire extinguisher is a marvelous invention, and its use in successfully combating a fire before it spreads out of control is a major triumph.
