I have eczema too and cannot use E45, I just use aqeous cream to moisturise several times a day and to wash in and even this can set me off sometimes.
I have never been able to use any fabric conditioner and bubble bath is also a big no no for me. Even Nathans baby soaps and bubbles set me off.
I use steroid creams too and my Dr also increased the strength recently as they now think its better to use a strong cream for a short time than a weaker cream for longer.
I have never been able to pin down which foods might effect me, it seems to be more to do with perfumes etc, although rain water also sets me off!!