The Bissell Rewind SmartClean Bagless Upright Vacuum, 58F83has a clean carpet sensor that lets you know when your carpet is clean. The clean filter indicator also makes maintenance easier, since you'll know when your filter needs to be cleaned or replaced. In addition, the vacuum's unique helix cleaning system will actually help keep your filters cleaner for longer. It does this by using internal "ribs" on the easy empty dirt cup to capture dirt and other debris. This forces large particles, dust and other debris down to the bottom of the tank instead of up into the filter, helping the Bissell Upright Vacuum to work more effectively.