It's probably not the end of the world. A lot of cleaners have a little alcohol. Since you didn't dillute it with anything, it may have eaten away some of the plastic. I'd start trying to restore it with a scrub brush and some plain 'ol soap and water. Mix the soap and water pretty strong in a small bowl and use an old tooth brush to apply it. Get a big bath towel, climb in the truck, put the towel in your lap under the steering wheel. Put the bowl of soap and water in your lap, dip the toothbrush and start scrubbing. The bowl and the towel should catch most of the water run off. I'd also turn the wheel upside down so water doesn't run into the cruise controls. Once you get it GOOD and CLEAN, rinse it good with a wet terry cloth towel, let it dry (or dry it good with another clean towel) then apply a protectant. I prefer something like "Eagle One Nano Protectant" (you can get it at most auto parts stores). Armor All would probably work too, but I don't care for it as much. Put it on pretty liberally and wipe down with a good terry cloth towel.
Microfiber towels work better than terry cloth, but you will have to buy those (wal-mart, target, autozone, etc. . )
Hope that helps. you should be able to fix it up. I doubt it's destroyed.