I scour all my raw wool in the washing machine (do NOT agitate).
First is skirting the wool (keeping only the prime 'saddle' part for spinning)., then shake out as much VM as you can, then go through it lock by lock and open the tips.
It takes up-front time, but save you time (and water and detergent) during the scour.
Fill washing machine with hot water. Add copious amounts of detergent (about 3 times what you would use on a heavy load of dirty clothes. Let agitate to dissolve & mix with water.
TURN OFF THE WASHING MACHINE
Gently add raw wool in machine and let soak for 30-45 minutes with lid closed.
Turn machine to spin (make sure it ISN'T spin & rinse) and let spin.
Remove fiber from machine. If clean, fill machine with hot water and couple glugs of vinegar and let soak 15-20 minutes, spin water out.
If more cleaning soaks needed, repeat above steps using less detergent.
Oh, I was looking at the bag of wool in my basement and I was wondering if you think that a front loader would agitate it too much?