A practical guide on how to find a dirty bomb: We discover together the close relationship to the task of finding a radioactive source, and why this is such an important task right now. I will present the key requirements that make up a good tool for finding a dirty bomb, and how these translate into the important properties of such a tool. I will then give a quick review of the currently available tools, and how they compare to our in-house developments. Then, I'll briefly summarise the local expertise that influences the current and future developments and give some hints at what we are planning for the future.