Heel callus removal

Lately, I've been really concerned about the dead skin on my heels. No matter how much moisturizer I apply, they quickly crack and turn white. It's especially unsightly when I wear slippers barefoot, and it's killing my confidence. Even if I exfoliate with an exfoliator, it only lasts a short time, and if I do it too often, it seems to thicken them even more. I've heard that exfoliating after a shower is good, but I'm wondering how I can keep them moisturized for a long time. If you have any effective products or tips, please share them with us!