On small skulls you need a wire or something to scramble it up a little but I usually get most of that stuff out when powerwashing at the car wash. On deer skulls I take my hole saw and make a 1 1/2" hole in the bottom and blast out the brains with the power washer after boiling. I guess I can't smell very good but on a fresh skull I have never had much odor at all, if any.