help with dry skin

HI, I've recently moved from a very humid climate to a very dry climate. (OKC, OK to Denver, CO). I have a hard time finding stuff to put in the tub to get rid of the dryness on my back and shoulders after I swim. It's awful. I've tried putting something from Vasiline Intensive care, it's like an oil, and things that bubble up too. And I have to put half the bottle in for it to do anything. Do any of you have any suggestions for what I can try for the bathtub. I have lotions and such, but I would rather it go back in the way it came out, through the water. Thanks a bunch. Kelli,