I spent the better part of yesterday trying to find what had died in the laundry room. It started when I emptied the dehumidfier into the floor drain and persisted through the evening. I poured water down the floor drain again and every time I did so the odor got worse.
I finally found the problem - dead tree frog! No kidding. A few weeks ago I found myself trying to track down the weird sounding cricket in the laundry room, partly thinking it sounded a LOT like a tree frog. Well said tree frog must have come in with the bushels of apples because there is no other reason for a tree frog to want to come into my house! It was either looking for a way out of the house or for water, anyway it is no more poor little fella.