One thing that worked really well on my old Volvo was cleaning the steering wheel with Mrs. Meyer's Clean Day Countertop Spray. I sprayed it on a rag and rubbed it on, and once it dried the stickiness was gone. I like the scent called Geranium best, although it really smells more like roses. I just happened on this remedy by accident, when I was desperately trying everything I had in the cabinet to remove the stickiness from the old rubber wheel! You can get the Mrs. Meyer's stuff at most natural foods stores, and at some regular grocery stores like Harp's. Good luck!
