I worked outside, construction for 32yrs. Fingers cracked every year in the same exact places no matter what I did. Creams sound nice, but it's not practical if your working with your hands. All it does is is attract dirt, which gets into the cracks, plus it also makes hand colder in winter. Some gloves also make problem worse by drawing the moister out of the skin. Solution = Cry and bare it until you retire.
Good Luck