How do you get the lanolin out of a raw sheep fleece.I have a greasy Merino fleece that needs to be cleaned?

this is a fleece for hand spinning, that I sheared off my old Merino ram. He has the most lanlion of any sheep fleece I have ever seen. I have cooked it in a pot a 150* F for 30 minutes. Washed it in amonioa. That seemd to do the best but there is still lots of Lanolin in this fleece.