I did my deer in an outdoor turkey fryer.
I skinned the head and with a fillet knife carefully removed as much soft tissue as possible after work Friday.
Used a long nose compressed air nozzle to blast out some of the brains after giving them a stir.
Put head in pot of water with dish soap and GENTLY simmered for 3 hrs.
Removed head and used a tooth brush/fine wire brush(dollar store tooth brush size) to remove excess flesh.
Changed water/ dish soap and continued to GENTLY simmer for 3 more hours. Then let it cool naturally in the garage over night.
Tooth brush treatment again.
In the morning, wiggled out the loose teeth/ ear canal bones, nasal bones/sinus webbing and put in a ziplock bag for safe keeping.
Continued GENTLY simmering and changing soapy water and tooth brushing,scraping until Sat night. Gently blew off with compressed air.
Then I placed the skull and all the teeth,nasal bones,ear canals,sinus into a bucket and poured a dozen or more(enough to cover skull) bottles of dollar store hydrogen peroxide into the bucket of bones and left over night.
Sunday after noon I removed the bones and let air dry on news paper. Then with some Welbond white glue,a tooth pick glue applicator and some patience I put the puzzle back together.
NOTE:
You want the heat high enough to pull the oils out of the bones but not too hot or the teeth will crack into pieces!
The dish soap needs to be the liquid kind (DAWN)and is used quite liberally.
NOT dishwasher soap or oxy clean!!....unless you don't like your aluminum turkey pot. Some people suggest this and I did a coon skull like this and discovered that both of these chemicals will start attacking the metal pot, now a stainless or enamel pot MAY tolerate these chemicals but I haven't tried it.
The Hydrogen peroxide will dissolve any remaining oils and light fleshy bits and make the bones WHITE WHITE WHITE, with no funky smells from your trophy later on.
Be careful when dumping out the old grungy water when changing, you may accidentally toss out a tooth or other small bones that have come loose in the bottom of the pot.
This is an outdoor project due to the bad smell and large amounts of steam.(Imagine cooking pasta ALL day with your old rotten gym socks thrown in there!)
Cover top of pot with tin foil to keep water from evaporating.
Keep skull below the water.
Skim off scum from time to time and add more water and or dish soap as needed.