BG Frigi-Clean® removes accumulated debris, road grime, and nicotine residue from the vehicle’s A/C evaporator system. It foams up to completely fill the evaporator core where it removes contaminants. Restores A/C system efficiency, removes foul odors and obstructions, freshens interior air. BG Frigi-Clean is biodegradable, non-toxic, and non-corrosive.