Dry Feet since childhood (nothing helps)

Hello,

Since I can remember, I had dry feet with cracked heels. (my skin regenerates dead skin extremely fast - after 4 days it's like after 5 months for other people) I tried a lot of things and made some tests (it's not athletes foot and no eczema)

Sadly, Urea 40% cream and glycerin isn't solving my problem. I tried around 20 creams and nothing helped. When I wake up, my skin is tensioning and also hard - Oil or Sodium baths only help for about 1 hour.

I do take a Dermasence Adtop plus 40% cream since 5 days now and took a weaker one the last 3 weeks. Could it just mean that my skin needs to heal for many months when I had this issue since my childhood?

Thanks for any help and answers.