Lisa:
What size is the coop and how many birds are you keeping?
It seems you have a covered run? If so, best solution to the messy conditions it to keep adding bedding and litter to it, even in the run. Pine chips, pine straw, tree leaves, etc. In some cases, the use of hydrated lime (some may go apoplectic about this one), but small amounts of 5 to 10 pounds per 100 square feet. That is not as much as it sounds, and also, you spread it evenly and mix it in. Straight, it may be mildly caustic to the bird's feet, but you do not leave it for them straight. Spread evenly over the top of the built up litter and then raked or mixed in. It keeps the odor down and keeps the litter from caking up and getting crusty.
It may sound counterintuitive, but some with long term experience have suggested the deeper you go with this litter, the better. A foot deep may not be as bad as you might suspect. It will be dryer and smell better than only a few inches. If it is covered, so does not get drenched with every rain, a run with roof, but open sides, with deep litter may be the best long term solution.
Having said that, this process does not go on forever. Eventually, you have to clean it out. Commercial poultry houses have a "hot" litter problem, more manure than litter, and are required by regulations in most places to have many, many acres lined up to spread it all out. You will also need a place to go with it eventually. Composted and put on a large garden (large being relative), but large enough to handle all the litter. Or else start lining up friends who have gardens. They many want it too once they see it's benefits. But beware, you can have too much of a good thing.