You can improve it by taking short baths or showers, which last for only 10 minutes. Use warm water, so that the oils on your skin do not evaporate and make it drier. When drying your skin, you should pat it dry with a towel instead of rubbing it. Also apply a moisturizer as soon as you are out of the shower, to seal the moisture in the skin. Visit http://www.livestrong.com/article/168644-how-to-improve-dry-skin/ for more tips.