I wash my hands often volunteering, even though I wear rubber gloves all the time, still washing is mandated.
I've used Hoof Maker for many years. A whole lot of years ago I was putting it on a horse's roughened hoof and noticed that my skin was getting soft and the nails hardened and grew better.
Still use it as do most of the RNs who work with us. And now I use the Hoof Maker brand of Broken Arrow for shampoo and conditioner. Good for the hair.