hello, there. i've had some experience cold water macerating, degreasing, and whitening skulls and bones and what not, but I have never had the experience of cleaning an animal with horn sheaths, i have a big horn skull that was given to me and it has massive horn sheaths.. most of the actual flesh material has degraded aside from some small fur bits around the horns adhering the sheaths to the skull. the skull was dry when i received it, and i'm curious as to the best method to get these sheaths off. i've tried to work a knife/flat head screwdriver under the sheath and have had minor luck. i'm currently soaking the skull to try to loosen up the dry flesh so i can take to it with some tools again, but i don't want to be soaking it for too long. there's still some brain matter inside the skull as well. in my preliminary searches i've found the sweating/steaming/rotting processes, but these have been typically mentioned for fresh/fleshy heads. a further question as well - once i've gotten these sheaths off, how should i go about cleaning them? salt and borax and let them dry? i apologize if this question has been asked numerous times before. i did some searching and couldn't find the right answer.