Clean Up Dry Chemical Fire Extinguisher Residue Vacuum or sweep up loose debris. Spray stuck-on residue with isopropyl alcohol diluted 50 percent with warm water. To neutralize sodium bicarbonate and potassium bicarbonate residue, apply a solution of 98 percent hot water and 2 percent vinegar. Click to see full answer. Similarly, is the powder from a fire extinguisher toxic?While fire extinguisher powder is non-toxic, it is not entirely safe. The chemicals used are considered appropriate for home use, but you should take precautions to avoid touching or inhaling too much of the powder.Beside above, how do you clean a foam fire extinguisher? Wet Chemical Fire Extinguisher Use hot, soapy water and a cloth or sponge to wipe away the foamy residue. Scrub all surfaces that have come into contact with the excess agent. Once all surfaces impacted with the residue are cleaned, rinse and allow time to dry before returning power back to the equipment. Similarly, it is asked, what is the powder inside a fire extinguisher? Monoammonium phosphate, ABC Dry Chemical, ABE Powder, tri-class, or multi-purpose dry chemical is a dry chemical extinguishing agent used on class A, class B, and class C fires. It uses a specially fluidized and siliconized monoammonium phosphate powder.How do you clean a grill after using a fire extinguisher on it?Scrub the inside and outside of the grill with a 50-50 mixture of water and white vinegar, which is a weak acid that will dissolve and remove the sodium bicarbonate residue from a fire extinguisher.