I suffered with eczema as a kid, but as I got older it gradually disapeared, however during my first six months of window cleaning, trad, my hands 'fell apart'. They cracked really badly; looked terrible; felt worse; they were like claws.
They were so bad I went to see the doc, who gave me a top emolument, and a strong steriod cream and advised me to wear cotton inners with a rubber glove, which I did; even though it was Summer.
Cotton inners you can get from Boots, rubber gloves from a hardware shop; don't get pink ones, you can get them in black.
Over time, my hands have 'toughened up' to being wet and in contact with detergent; but I still look after them with emolument creams; the big softy I am.