So you’re the type that’s obsessed about cleanliness and intent on exterminating every tiny speck of dust and other dastardly contaminants. What you need is a device that connects to your iPhone and tells you when you need to go in for the kill. Specifically, what you need is the Personal Environment Monitor (PEM) from Lapka, Inc. It’s compact and tiny, but with powerful sensors that help you measure and analyze what you’ve got in the air. The best part is that the app will provide an analysis of the results based on the kind of surroundings you’re in. For example, it could be a baby’s room or an office or the street outside, and the app will tell you where you stand as compared to the average for that specific environment.