We've all been there – it's a scorching summer day, and you turn on your trusty air conditioner, only to find it's not doing its job correctly. You're left wondering, "Why is my air conditioner not cooling properly?"

From intelligent sensors to advanced navigation systems, here’s everything you need to know to understand the basics of how robot vacuum cleaners do what they do. 

Smart devices are increasingly using big data and machine learning to help us get the results we expect from their use. But without an understanding of how they work, are we exposing our personal lives to faceless reviewers? How does this technology work, and what does it mean for our smart homes?