There is nothing more annoying than having dry and flaky lips. Soft lips are also a requirement if you like to wear lipstick, especially bold color or matte shades. I have experienced dry lips since I cannot longer remember and I have also had several allergic reaction to some lip balm or even eczema crisis. Bottom line, I have tested a lot of thins and here is my top products and methods.
Exfoliation is not only for your body or your face. You should also scrub your lips in order to get rid of the dead skins creating this flaky effect when you put lipstick. Then use a good and strong moisturizer.
My favorite combination is this lip scrub from Lush and NUXE lip balm. I love these because they are both very good but because the ingredients are mostly natural.
However if you want a 100% natural option you can mix brown sugar with olive oil or coconut oil to create your scrub and use shea butter as a lip balm.