I tan a few hundred bears a year and have for 21 years. about one bear a year comes in from a bear baiter and has an excessive amount of cooking grease in it's fur.(animal based cooking grease). All hides are soaked up in a dawn soap solution, pickled, degreased in knolbock's EX-40, and tanning solution has a generous amount of dawn soap in it. Any product that will take this grease out of the hair after it has been tanned? Grease is soft and oily. I have tried many different product over the years.