Amazon's fall Prime Day sale event kicked off this morning, with two days of steep, rare deals on sleek vacuums that will streamline your cleaning. We’re talking lightweight yet powerful upright, stick and robot options from top brands like Dyson, iRobot, Shark and Bissell — up 50% off their typical retail prices. And can we talk about the sales on portable handhelds and floor cleaners that will leave your upholsteries looking like new?