I pull, scrape, cut all the meat off that i can.
Lower the skull cap into boiling water. Boil for about 20 minutes.
Pull, scrape, cut any meat that is left. Repeat process until there is no meat at all. Let it dry real good. Use a Dremel tool to shape the skull cap

I make sure i get 100% of the meat off dring this process. I hang them within 2 days. I have 5 that i have done this way and never had one smell