How to chooseThis is part of a regular series of articles designed to guide you through the process of buying a particular device or type of product. Read them all here.We’re big fans of smart home gadgets here at TechRadar, especially when they’re robots that can do household chores for us. Robot vacuum cleaners have been around for a while now – 20 years, in the case of iRobot’s Roomba range – and in that time, the best robot
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