Had excellent advice from nurse specialists in dermatology clinic. Try and speak to someone similar.
Lots and lots of moisturiser, one that works for you, twice a day minimum.
You may well need to use moisturisers in rotation e.g. 2 bottles of Oilatum, then 2 tubs of Unguentum M. And repeat. You need to make sure you get enough volume prescribed.
If excema is still an issue, steroid, at lowest strength but in a visible, greasy smear over the patches. Put it on after a bath with an emollient (e.g. Diprobath oil, and no soap), and leave it alone, without dressing, for 10 minutes. Then PAT moisturiser over the excematous, and normal skin. (so you don't smear the steroid over onto skin that doesnt need it). A week of diligent routine, if its not working step up the steroid strength, but use the same sort of quantities - ie, every patch of excema should be covered with a visible greasy smear of steroid.
And then, the thing that really cracked it for us - Tubigrip garments. Available on prescription, a very tight top/tights, they hold the moisturiser on the skin over night. Brilliant brilliant brilliant.
The idea is to use steroid regularly for flare ups, but not daily endlessly.