We used Aveeno Advanced Care lotion. We tried lots of others and this was the only one that helped. Also, we finally figured out that corn was the trigger and when we took all the corn out of his diet (it's in everything so it was really difficult), it went away.
We only bathed him once a week and I slathered the lotion on him before I dried him off. Then I just pat-dried him and put his pajamas on.