yeah when I first got mine I noticed bits of skin that's came off that was still stuck to him but after a few days in the tank he was coated in eco earth due to burying himself but the next day it was out of its depression he made and had made another but not as deep about 5cm away from the old one ( I filled the old one back in, and now in the new one has buried its self again) and he looked really clean not one bit of eco earth on the top of him and I know he hasn't been in the bowl as it is still clean but haven't found no goo so he might of ate it