What finally worked for me was using a simple body routine right after...

https://gravewind33.gumroad.com/p/i-always-forget-sunscreen-on-my-feet-any-tips

What finally worked for me was using a simple body routine right after showering—when my skin is still damp. I apply a cream with 10% urea on my heels to soften rough patches, then follow with moisturizer on arms and legs