What can I use for dry itchy skin? I have tried coconut oil, and after 15 minutes, I'm ashy again. Used Goldbond lotion, didn't work

Dry skin. The best treatment for dry skin, assuming no other pathology like hypothyroidism, dehydration, diabetes isn't the cause, is applying a moisturizer like keri lotion after a shower or bath while your skin is still wet. This serves to restore oils and normal moisture to the skin. Avoid very dry environment(too much dry heat, Sun or excess air conditioning.
Ceramide. SOAK in a bath or shower for a long time. Hot is OK. Fingers should be wrinkled. Any cleanser must be pH 6 or 7 such as Aveeno, Eucerin, Dove, Neutrogena. Within 3 minutes after soak, rub in a ceramide cream. Check labels. Eucerin, Aveeno, CeraVe, generics. Get a big jar. Be sure it contains ceramides.