Bit late on this thread. This happens to me so this is my solution (hopefully). I tried this before with oil, next time I am going to try a grease like for snowmobiles. You may also need the wifes permission to do this operation. Get a tin can and put a wad of the grease in it. Heat it on the kitchen stove until very hot. carefully drop the freehub into it. Make sure there is enough liquid to completely cover the freehub. Let it simmer in there for a while. When I did this with oil I could see the water leaving the body.
Hopefully the liquid grease will find its way into the freehub and be ready to go when cooled. I actually plan to let mine set in the cooled/cold grease before I remove it.