id be more worried about my wife finding out haha
I use the 5-7gallon galvanized tubs from the farm store. Heat them with either the side burner on the grill or a fish/turkey fryer burner.Take a stiff knife or screwdriver and try to seperate the horn from the skull a little, then spray some water in the crack, wrap in a garbage bag and set in the sun for a week or two. Then throw it on sheet of plywood or on the lawn. A big dead-blow hammer with a piece of 2x4 for padding also helps.
I used to have a big pot to boil skulls in my back yard. One time we were gone, and my neighbor was watching my house. They borrowed my pot to cook up a bunch of crabs. I never told them what the pot was really used for.
I feel like my risk tolerance is pretty high, some would probably say extremely high, but the risk of getting caught by my wife trying to microwave a mummified deadhead is a bit beyond that tolerance...Honestly, really doesn't stink. A bit unsettling so better to do while everyone is out of the house.
My taxi tried this with a sheep I took in HI. and it actually boiled weird bumps in the horns so be careful. He normally did the same with antelope and had no issues. He had a lot of work to fix that mess, ended up burying the head and getting the horns off, then he had to drill out the damaged areas and replace damaged material.Microwave works great as well if you can get it in there