Keep boilin it in detergent and stuff and take it out every once in awhile and scrap stuff off. Toget the junk outta the nose I grab the head by the horns and give it long throw downwards between my legs and the junk will come flyin out on the ground. Just hang on so you don't let go and the skull goes flyin. Boil more and repeat till the skull is fully clean. Make sure you get everything off and all the brain out otherwise it will rot in the future. WCL