I mean filth, animal feces ground into the carpet and dried, dirt everywhere. Not to mention unsorted clutter. Mom was always very clean and neat. My sibling moved in and the house has slowly turned into a sewer - there's nothing she can do and she needs the help as she is very feeble, and won't hear any critisism of this child anyway. I live several thousand miles away. When I come to help, I feel so nauseated that I can't eat for days on end. I clean and clean-I'm not very good at it- but cannot catch up, more filth is tracked in, more grease from cooking, nothing ever washed. Cleaners have been hired but they quit in disgust. I think the sibling has a disorder that makes dirt invisible- and thinks I'm a neurotic and am "having a fit" when I (calmly) try to talk about the dirt. What can I do about this situation?