Maria Diaz/ZDNET Follow ZDNET: Add us as a preferred source on Google. At ZDNET, we’re all about putting tech to the test to actually see which phone has the best battery life or which robot vacuum has the best pickup performance. And when we tested 10 different robot vacuums in our lab, one was the clear winner. Also: My favorite Memorial Day deals: Save big on laptops, tablets, and more The Ecovacs X8 Pro Omni had the best average score for sand pickup on both hardwood flooring and carpet. And right now, it’s $67 off during Memorial Day weekend sales, meaning you can snag this Lab Award-favorite for just $599.  Compared to the other robot vacuums we tested from brands like Shark, Roborock, Dreame, and others, the Ecovacs Deboot X8 Pro Omni picked up an average of 60.28% of sand across all three of the testing categories (hardwood floor, low-pile carpet, and mid-pile carpet).  Also: We compared 10 robot vacuums for sand pickup – and one model was the clear favorite Aside from its impressive pickup performance, the Ecovacs …