Crabs big pincher is cracked after moulting

[Bugaboo]

I recently saved one of my crabs from being attacked by his larger tank mate while he was molting. I put him and his exo in iso, he ate his exo and seemed to be doing fine. I checked him yesterday, and his big pincher has a crack in it and looks like it has dirt inside, I'm not sure what could've happened... hes eating and moves around, i provide him with cuttlebone and mealworms, salt and fresh water. Just wanted to know if anyone had any advice or any experience with anything like this.

[Wai]

I would just leave him as he is if he is behaving fine. You're doing the right things.