Carpets contain STUCK ON DIRT that traps dirt, dust, allergens and odors. Vacuuming alone only removes the loose dirt, dust and debris - it leaves behind the stuck on dirt. This stuck on dirt contributes to discolorations, staining, dinginess, and odors. The Sonic DuoTM Carpet & Hard Floor Cleaning System is a new product that can remove this stuck on dirt quickly and easily with its revolutionary Trap & RemoveTM Technology. Trap & RemoveTM Technology will remove 4X more dirt than vacuuming alone by unlocking and dehydrating the stuck on dirt so that it can be vacuumed away later. Your carpets and area rugs will begin to look cleaner and brighter, and smell fresher. Plus, with regular use, the stuck on dirt won"t come back so you can enjoy cleaner, brighter, and fresher carpets all year round. Use 2X monthly for best results.