This feels like it could be a challenge similar to that DARPA challenge to spot all of the red balloons as fast as possible. Not nearly as trivial as observing

This feels like it could be a challenge similar to that DARPA challenge to spot all of the red balloons as fast as possible. Not nearly as trivial as observing a conspicuous balloon, though. But I'd like to think this could be reduced to a tech challenge somehow, through ambient humidity detectors, or something ridiculously straight-forward like that. Obviously with enclosed structures, and plumbing being what it is, it's probably not even close to being as simple.