S.T.
I think if the cradle cap is thick it may have a waxy kind of smell. But on another subject I have been doing a lot of reading about soy and you might want to read this article and reconsider soy formula...it can affect a child's reproductive system, thyroid and other problems. There are benefits to eating soy but it can also affect adult health negatively as well. The articles are very interesting.
http://www.utne.com/2007-07-01/Science-Technology/The-Dar...
http://www.utne.com/2007-07-01/Environment/How-Much-Is-To...
S.