Thanks Don. I did them in the Jeep. I just sprayed them down with a hose, scrubbed with the Dawn, let sit for 15 mins, rinsed them with the hose while sucking the water up with my shop vac. I had to do this three times to get the tar/grease out of them. I kept going over them until I could not see any more water being sucked out.
I drilled a hole in my vacuum attachment so I could watch the water being removed. It worked dam good.