Excema

Does anyone have any suggestions on what else I can do to help prevent this? DD is almost 12 weeks. She is on Similac Soy formula, I am starting to wash even my clothes in Dreft, I have cut down on her baths, and I moisturize her skin several times a day, especially after a bath. Her pediatrician is also allowing me to use cortisone 1% but I am still needing to use it on a daily basis. The next step is Similac Alimentum. At first the rash was just on her cheeks but now I am seeing it every where else.
Thanks!