My skin is super dry no matter how many mosturizers i use.. it remains dry. plz help ?

Dry skin: A 21 year old female with extremely dry skin. Dry skin responds to ointments the best. Ointments are very thick, like Vaseline. Creams are the next best option which are also very thick, but not too greasy. The least effective option is a lotion, they are not moisturizing enough for very dry skin. Apply an ointment or cream at least twice a day, more if possible. Avoid scented or dyed products.