Machine refresher + odor remover. Not for use with clothes. HE: For both. Gain's oxygenated formula helps remove odor causing residues (Residues found in washing machines from laundry soils, detergent residue, and water hardness minerals.) that build up on the surface of you washer over time - even from areas you can't see. Safe for septic tanks. Contains no phosphate. Questions? 1-800-888-4246. www.ILoveGain.com Patents: www.pg.com/patents.