I had that on a steering wheel one time, and I used Goop hand cleaner. I just rubbed it on the whole thing (not sparingly), let it set about 2 minutes, used a wet soft bristle brush on it a little, then a wet rag to remove it, and finished it up with a clean towel. It actually took about 3 times since it was pretty heavy, but it all came off. The I put a leather 'lace on' steering wheel cover on it so I wouldn't have to do that again.
