6 inches huh? That is a lot of work. I am not Bee, however if I were you I would stop stressing. Think of deep litter as making lasagna. One layer at a time. I would not take it all out and start over. I might consider piling most of it in a corner and layering it through the winter, adding a layer of chips once a week. Just a suggestion. Right now mine is a bit dry and I am not adding anything but poop to get some moisture. As winter approaches the hens will be adding more from poop and breathing. I do not put water or food in my coop however if it continues to be dry and cold I might change my mind. The weather here is usually high humidity. I am not starting over just because I have to much dry, I just tweak it and push back dry to add wet.