Put on some rubber gloves and go round up an old dried dog turd ( I bet its a pretty similar smell as your steering wheel). Now, spray it down really good with anything you like (any of the above suggestions for example) now, put it on your dash for a week and get back to us on the results. I'd ponder a guess that it will still smell just like an old dog turd, only one that you spritzed up with some perfume