I've been processing lots of raw fiber. It started out as curiosity, just to say I'd done it and just to learn how to do a raw fleece. It has turned out to be a preference - there is something basic and bonding about getting to know a fiber the way I do when I see it raw, clean it, process it, and spin it. The differences between the fibers produced by different breeds of sheep and fiber animals stands out to me when I spend this much time with it, in this many different ways.
And so with raw fleeces, I am also spending a lot of time with lanolin. My hot water isn't really hot, since we have a hot water heating system that limits the hot water heater temperature. Enter issues with cleaning lanolin from fiber.
Everyone I read indicated Dawn dish washing detergent was their cleaning agent of choice. I followed the advice - who am I to question it? That was my first fleece. I washed it probably four or five times, and two rinses. The fiber was carded twice with my drum carder. I STILL wound up with a fiber that was virtually undraftable because it was tacky to the touch and the fibers wouldn't slide past each other well.
Enter: experiments with various commercial fleece/fiber washing products. Eucalan woolwash. Kookaburra Woolwash. Meadows Fibermaster. Kookaburra Woolscour. The wool washes made the fiber smell better than did the Dawn, but I can't say they moved the lanolin much better. Last night, however, I took equal weights of my Rambouillet fleece which had both been washed in Dawn simultaneously and were now dry, but not finished. There was still a lot of lanolin at the tips, and the fleece still felt like it carried a lot of lanolin.
I put one batch into a sink with Meadows Fibermaster and the other batch into the same sized sink with Kookaburra Woolscour. They both got a LOT more lanolin out of the fleece. My feeling was that the Fibermaster had gotten more lanolin off, but it was hard to really tell. While drying, the Fibermaster fiber smells better - a softer, pleasing scent compared to a more chemical smell from the Woolscour.
My final comparison test was later last night, when I took some of the fiber from my first fleece, the one which is very hard to draft to damn near impossible to draft. I wash it in the Kookaburra Woolscour. I didn't get much additional visible stuff off, but as the water was drained after the second rinse, the wool STILL felt tacky to the touch. So, I started over and used Meadows Fibermaster on it. Success. The wool is FINALLY soft and lofty and draftable. It smells nice. And as a bonus, the Fibermaster has natural moth repellent botanicals in it. So, if you are interested, IMHO, Fibermaster is currently the best thing out there for cleaning raw lanolin rich fiber. (And I've read that Fe-breeze is good at getting out goat odors for those of you wanting to rid goat fiber of the unique odor of goat.)