Ok well i managed to get the poop out from under his nails,
I tried the flier and the washcloth but it really wasn't getting it all off.
The poop was harden so much I ended up having to use my fingers to pick it out XD
but he seems alot happier now. It was tough because i was alil scared of hurting him.
He actually remained calm while i got him on his back.
And all at the same time i got to clip some of those nails too