I knew a family who were incredibly unclean
I knew a family since childhood who were so dirty that you wouldn't even want to touch something that they had touched. Their house was filled with animal excrement, literally covering the floor. The women never shaved and bathed very seldom, like once every few weeks. They smelled so bad it was unbelievable. The grocery store they shopped at once gave them a package filled with soap and deodorant. It was that bad.
Their dogs always had parasites and child protective services was called more than once just that I know of. Their daughter was taken away temporarily at one point and they still only cleaned up long enough to get her back and went right back to living in filth. For obvious reasons I cut them off long ago. Recently I was working with a company making a bid for the trees on their property and had to pay them a visit. It was too cold to stay outside so i stepped in. It was the same old thing with filth everywhere topped with a dead cat that was beginning to smell. I stepped out and vomited and left, refusing to return.
Have you ever known anyone like this, who are so disgusting that you can't even be around them?