Every year we volunteer at the Sheep Shearing at the Staten Island Zoo. Some members get fleece... which of course needs to be cleaned.
A few Pointers:
As per suggestion in our "Skirting" post.... we recommend that you send your fleece to a professional service to get it cleaned.
But if you feel the need to do it yourself, do some research before you start so you don't end up with a felted mess!
Search for "how to clean a fleece"
here's a couple good tutorials: