★★★★★
What works for me for Cracked Heels is the following: First, I'll cover the crack(s) with a band aid to alleviate discomfort. Then, while showering, I use the coarse side of a foot Emery Board until the skin around the cracks is no longer calloused or hard; I then rub the area carefully with the smooth side. Finally, after the shower, I try to leave that area a little damp and use a non-fragrant body moisturizer from the health food store if the crack is not too sensitive - otherwise, a band aid again. As a followup, I try to maintain this area with moisturizer and periodic use of the emery board. I've been doing this for several years with good results. I hope this helps.
What I haven't been able to do is heal the cracked tip of my finger or thumb. I'll try the vinegar and see if that helps. The band aid therapy works, but I want to eliminate the cause, whatever that may be...