What finally worked for me was a simple routine after every shower. I make sure...

https://sophiasbestchat.capitaljays.com/posts/what-works-better-than-a-body-scrub-for-elbows-and-knees-2

What finally worked for me was a simple routine after every shower. I make sure to moisturize within 60 seconds while my skin is still damp. Using a cream with 10% urea on my heels softened the rough patches that nothing else touched