Having wild jellypots, jewelbugs or pillbugs in the map solves the issue, but filth still accumulates if these are missing. We might want to consider a rare, cavern-only incident that cleans all filth. It could be something like a plague of microoscopic organism or mechanites, for example.
Having wild jellypots, jewelbugs or pillbugs in the map solves the issue, but filth still accumulates if these are missing. We might want to consider a rare, cavern-only incident that cleans all filth. It could be something like a plague of microoscopic organism or mechanites, for example.