Dry ice is solid carbon dioxide. It is obtained by condensing carbon dioxide into a colorless liquid at a pressure of 6250.5498 kPa and then solidifying it quickly at low pressure. Dry ice cleaning process. Dry ice cleaning uses compressed air kinetic energy to drive dry ice in the dry ice cleaning machine. Dry ice mixes dry ice and gas through professional equipment and sprays onto the surface of the object through pipes and professional nozzles to achieve the effect of cleaning and decontamination.