Originally Posted by Marti
It depends on how they are splitting and why. Do you use strong solvents such as household cleaning solutions without gloves? Are your hands in water a lot? Are your nails naturally thin and weak? Where and how are they splitting? Vertical or horizontal? A little more info would be helpful.
I realise this is awhile ago, but I just found this board while googling for an answer to the same question.
My partner has a thumbnail that originally split vertically while doing some outdoor work. It will eventually grow out, but then after about 6 months it will split again, and you can see the fault line even when it's not splitting. Can you help me find a solution for her please? Thanks