So a housemate of mine saw some of my carboys and realized that he had a couple at his parents house up in the mountains. He told me they were pretty dirty and asked if I wanted them. Me, being armed to the teeth with PBW, graciously accepted them. When I got them they were pretty well covered with dirt and contained what appeared to be leaf and needle litter inside. The first one I cleaned with no problem in my shower like I normally do. Just some leaves and dirt inside, and some stubborn pine sap and dust on the outside. The next one looked a bit tougher as it was probably an eighth full. When I filled it with water and PBW the water turned dark amber brown and nearly everything floated to the top. I was pleasantly surprised at how easy it was to clean. However when I dumped the water out, the leaf and needle litter turned out to be about 10% plant matter and 90% rodent carcasses. I was even able to identify one as a small squirrel. Needless to say this carboy got extra care and an extra round of PBW. My girlfriend my never show at my house again, but I got two free carboys out of it!
This got me thinking what's the grossest thing anyone has found in a Carboy? Derelict or otherwise?