FAQ Search Select a Category BarkBath Cleaning Formulas Cleaning Tips Commercial Products Corporate Deep Cleaners Hard Floor Cleaners Mops, Brooms and Brushes Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go How long does a treatment of Acarosan last? Answer: Each treatment of Acarosan® lasts up to two weeks when using the spray. The powder will last up to four weeks. Related Questions Why is OxyPRO dual chambered? My Self Propelled ProHeat machine sprays continuosly. How can I correct this problem? Can I use Little Green or Little Green Pet Formula in my full-sized Deep Cleaner? How do I use the 2X concentrated formula?