All of my children have delt with E in some way but my middle boy had it the worse. I have used it all and been prescribed everything under the sun. Below are the only things I have found to work. None of my children have E anymore, not even my middle boy; no break outs at all.
Wash his clothes seperately. Do not use any scented laundry detergent on his clothes. Use 'All Free'; it is the best. Do not use softner. If you have to, dilute with water 1 part softner to 3 parts water. DO not use dryer sheets. Make sure you run it through an extra rinse cycle.
No bubble baths, ever!!! Let your child play in the bath, then wash up, and immediately get out!! Limit baths! Limit amount of time in the water. You can always "treat" them to a long bath (still with NO SOAPS) when they are totally healed.
Once out of the bath, "pat" with towel. Immediately put on lotion. The only lotion I have found that works and doesn't burn is Cetaphil. You can get a 2 pack for approx. $15 at Costco or Sams. It is the only lotion my boys are allowed to use.
When E was at its worst for my middle son, we took him off milk (milk products irritate E). He drank the Vanilla Soy "Silk"; it is the only kind he liked. Cheese didn't seem to affect him so we did not limit that. We also gave him lots of yogurt, which is proven to help E.
Until the break outs ended, we used ProTopic. It is the best. It does sting but not as bad as the other stuff out there. My Doc had us put on lotion, apply Hydrocortizone Cream (to the break-out) then put on the ProTopic (on the break-out). It really helped reduce the sting. And it really helped it heal and clear up quickly.
Like I said, my son has no more outbreaks. He had E from birth to age 4 1/2. It is alot of mindful work at first but it becomes second nature. I still wash the boys' clothes seperate with the All Free but can now use a little "real" softner without it causing any problems. And this last year he started to drink milk again with no problems.
Just a side note.....bring your child in for an allergy test. I know you might have heard how bad it is but it is worse being sick/itchy all the time. Not to mention, we live near National Jewish!! I have heard they will even do them for free, but you'll have to look into that. My middle son is allergic to peanuts (not deathly), and every time he had something with peanut oil, extract, ect...it was bad. We discovered that he E was caused by allergies and not actually E.
Good luck!