I never have splits but I have the sweatiest hands in the biz. Also no finger injuries because of my in-built safety "break away" sweaty finger feature. Needless to say I suck in the gym, but shine on desert crags.
A small amount of Vaseline on the split and a bandaid overnight works great if you just suffer from splits due to cold dry winters. It stops the split from getting worse if your fingers swell during the night and it heals way faster.
But what about split tips?? right in the 1/4 to 1/2 pad area?? more towards the top of the finger? Just curious if you have different beta for this area of the fingers?