I own a skull cleaning business in PA called Premium Skull Works. I do well as far as the amount of skulls I get in a year. I see people online in the Facebook community post pics of their deer online and then short time later they have another pic posted online of their Euro mount back from the taxidermist. How in the world to they get the grease out of the skulls so fast and back to the customer? I degrease by a heated insulated tank and each skull goes into a 5 gal bucket full of Dawn and sometime ammonia. I have the water heated between 115 and 120 degrees and I do water changes all the time. I am not sure if I am too picky about the grease in the skull or if I am doing something wrong. If I see any sign of grease back in the tank it goes. Does anyone see anything I am doing wrong and should I change anything? Or am I just to picky? I just want to ensure that people get a quality mount back and not something that is going to yellow on them.