EXTREME dry skin? .. what to do?

Well i have extremely dry hands, and they are almost like scales.
They get so dry that they feel like sand paper,
It doesn't matter how much lotions I put on it,
I have tried everything out there, from hemp to coconut butter oils.
Nothing ever works for me, it just dries it up. What is a remedy that isn't like a skin care product to buy, because nothing works. What is something that I can do to make my hands not so disgusting?

Ps, i'm 14 year old girl,
and yes, i DO wear mitts in the winter :)