Canny cleaning for a faster, easier clean The Rewind SmartClean Vacuum has a Clean Carpet Sensor that lets you know when your carpet is take a shower. The Clean Filter Indicator also makes maintenance easier, since you'll know when your filter needs to be cleaned or replaced, which can baffle damage. In addition, the vacuum's unique Helix cleaning system will actually help keep your filters cleaner longer. It does this by using internal ribs on the Lenient Empty Dirt cup to capture dirt and other debris. This forces large particles, dust and other debris down to the rump of the tank instead of up into the filter, helping the vacuum to work more effectively longer.