I'm pretty frustrated that I can't easily get an overview of habitat cleanliness. It seems to jump from 100% clean to "disease risk" with nothing in between. I wish it were more like the barrier status, where it slowly declines and shows the accurate level of decline. So far I can manage it by using a heat map for cleanliness and looking for the red circles, but when it comes to big zoos, it would be much easier to use the pull-out menu and see everything at a glance. Better yet, it would be great to be notified before the habitat reaches "disease risk" levels of dirtiness.