How are you storing that bread? Not in plastic right? (You know better than that of course.) Maybe you're wrapping it in a paper bag. That's not bad, but it's still going to dry out pretty quickly.
This, my friends, this is how you store that loaf. Place it cut end down on your counter, or for ease of mobility, on a plate. Your bread will will stay fresh-ish for several days, as you slice it down to a crusty nub.