Didn't really know where to post this - P daddy and his long-term GF of 10+ years are both terrible hoarders. To the point where it is difficult to walk from one side of the room to the other. It was also unsafe to take my young daughter round there, before I went NC with them.
Both of them would be terribly offended if you called them dirty and wondered aloud why it was they had such a problem with mice.
Anyhow, here is an interesting BBC show on the subject of hoarders. I don't know where the people dealing with them got such patience, it would drive me batty.