Here is an odd puzzle. At some point in experimenting with devices I must have paired a zigbee water leak sensor and then never bothered to use it. I can see it’s still connected to the hub and the battery level has been going down for a while.
Any suggestions as to how I can find it physically short of going round the house with a water hose and seeing where it triggers 
The connection path I suppose gives me a clue as to which room it’s in but I haven’t found it yet, and not sure if that’s a reliable strategy.
Edit: It even survived a hub replace
