I agree. You can't clean that. It's in the sheet rock and floorboards. The house is worth only its land value at that point. It would be cheaper to level the house and install a damned trailer. Or level the house, put the old bat in a home, sell the land and use the proceeds to fund her care. Anybody craps in a cup in front of her own grandkids, who then hoards cups of her own crap, and who allows said cups to spill all over the floor needs to be institutionalized.I'd say burn the house down and start anew.