Mr. Chem-Dry uses an innovative carpet cleaning process, which uses CO2 and a non-toxic, environmentally friendly solution to produce millions of sparkly effervescent bubbles which quickly penetrate carpet fiber, dissolving dirt, grease and pet stains. Acting as tiny propellants, these bubbles actually lift dirt to the surface for extraction. Crystal clear CO2 is the releasing agent, rather than soaps or harsh chemicals, so there is no sticky residue left in your carpet to attract dirt. When you need your carpets clean, call the carpet cleaning experts.