FAQ Search Select a Category Cleaning Formulas Cleaning Tips Corporate Deep Cleaners FAQ Hard Floor Cleaners 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 did the brush stop rotating on my machine? What are the main uses for the Acarosan spray? I have an upright carpet cleaner. When mixing the cleansing formula do I use it full strength or dilute it in my machine? Can I use OxyPRO as a pretreater to deep cleaning?