Dear community, I need your help ASAP!

I always fed my BP in his terrarium, but now a rat exploded in there and hit the walls with its entrails while doing so..
Not wanting to start a discussion about feeding in the terrarium here, I just can't get rid of the terrible smell.
I already changed the bedding and tried to wash it out with water, but nothing seems to stop this smell on the walls.

Got any ideas what I could use to clean up?