8 month old with eczema clearing

Hello
I have an 8 month old who started out with baby acne at the age of 2 weeks old. This eventually developed into eczema at the age of 6 weeks when he stopped nursing and was switched onto soy formula. It really flared up when he was switced onto regular formula at the age of 3 months. He was then switched back onto soy formula and remained on that until 5 and a half months.

He never slept more than 2-3 hours at a time and had terrible gi distress (bloating/gas). At 5 1/2 months he was put on a hypoallergenic formula that seemed to relieve his gas and he started to itch less and sleep more. His clothes are washed in borax and no dryer sheets are used. His room and our entire house have ionizers. The only creams that have been used are homeopathic (florazone).

I have been giving him reverse osmosis water to help thin out his mucus (he seems congested sometimes) and he is currently drinking rice milk and eating various organic foods with no apparent problems and seems to be improving. He no longer has scales on his scalp and his face is clearing finally.

The other day I made the mistake of not checking ingredients on the boxes of baby cereal and ended up giving him 1 bowl of cereal that had yogurt and skim milk powder in it and he broke out in hives on his back and stomach and all around the back of his head and face. I bathed him in oatmeal and covered him with zinc oxide cream and the next day it was entirely gone.

My question is about the frequency of sulphur 30X that I should be giving. One dose and wait five days? Or is it one dose diluted and given over a period of days?
Any help offered would be appreciated.