corn huskers lotion works well. Use it every night.
I have suffered with cracked finger tips starting late fall through the winter into early spring. The last few years I started using BandAid liquid bandage which was wonderful as it "glued" the crack shut and also healed it and wore off as the crack healed. Unfortunately, Johnson and Johnson discontinued the old formula with the bottle and activator swab and substituted a new formula that does not work at all. It already has the "supposed" crack healer on the swab and can be removed with alcohol. The old formula had to be removed if you wanted with baby oil. As I use alcohol on the cracks before I applied the liquid bandage that probably did not help it to adhere although even when I did not use alcohol it did nothing for the crack -- just washed off very quickly. The old formula healed in 24 hours.
Luckily I have found a substitute called Glueshield which contains a cyanoacrylate like the old Bandaid product. It sometimes doesn't work as fast depending on the size and depth of the crack but it is better than anything else out there. I have tried them all.............. Believe me, it is wonderful to be able to type, get washed without using finger cots or vinyl gloves, etc. Johnson and Johnson made a boo boo when they changed the formula.
To all those out there with this problem that is the best substitute and you don't need band aids on every finger (which is useless anyway). Can't even wash your hands. I am so glad I found them.