Doesn't matter what soap I have tried ( fairy squeegee off ecover ) fingers still split even wear viynal gloves so far Sainsbury's with aloe vera is the best but not perfect. Anyone with same problem found an answer
I had the same problem for many years after burning some fingers with concrete.
Every winter they would split open and after starting to use WFP they got even worse.
The only thing that helped me was Neutrogena hand cream before and after work and making sure that I always wore a pair of Nitrile disposable glove replacing whenever damaged. I had to do the same when doing any DIY type work around the house. After 6 months of wearing them for all work my splits cleared up and have never come back.