[Product Request] Skin so dry, it's painful

I am a 63-year-old woman. It's heating season again and the office where I work is very dry. During last heating season, my colleague tested the humidity levels and they ran from 16%-19%. I can run a humidifier at home, but there is nothing I can do about the air in the office. My skin feels rough and scaly, and it's painful to the touch or when I smile. I moisturize three times a day and exfoliate once a week, but this has little effect. My body gets a little itchy, especially my back. I can see scales on my legs, but they do not hurt and aren't very itchy. By the end of the work day, my throat is so dry I can barely speak. Does anyone have any suggestions for me?