Deer Skull — Boil/simmer Method?? (help Asap??)

I just use another plastic tote like the one on the floor in your picture and set it on top upside down for cover.

 

I do it the fish tank heater way. This buck had hair/skin dried all over, was hit by a car. It was a target buck of ours and a buddy found it driving down the road. He was on camera every day/night until Oct. 10th, then gone. He had two roads to cross before he got o our spot. He was also a fighter, he had one eye, a gash on his hip, a broken nose and multiple old scars.
It didn't take that long, there was some stink involved, a lot of stink. After less than a month it was clean, 3/4 of the water was changed once 1/2 way. Then a clean water/dawn soak for a few days. Then air dried completely in front of fan then 40% peroxide soak for two days. Not one hint of a stinky rotten deer and nice and white.