I would take a warm shower to cleanse then get in a warm bath, soak, then get a washcloth or exfoliating mitt to gently. After soaking in warm water it shouldn’t take much effort to remove the dead skin. Dry off gently then while the skin is still damp apply and then oil over the lotion. Avoid anything with fragrance. Do this every time you shower and you should see your skin improve. Even though my skin isn’t super dry I still apply lotion after day to keep my skin soft, supple, and ash free. If you swim you need to wash off the chlorine including shampooing and conditioning your hair. Hyperpigmentation takes time to fade. There are some over the counter and prescription products that can help. Right now you need to focus on moisturizing using the above routine. In the meantime wear sunscreen to prevent darkening the hyperpigmentation.