We have 75 chickens, and clean the coop spring and fall down to the floor. In the meantime, it gets some Stall Dry and fluffed occasionally or if I see a damp spot or smell ammonia. 9 months out of the year, the chickens only go in to lay eggs or sleep, so don't have to do much. In the winter, I probably fluff and add Stall Dry and shavings once a week. We also have six full-sized house windows in our coop that stay open 9 months a year as well as roof vents, so there's lots of air movement. The bedding gets to be about 10" high before it gets cleaned out. We have no problems with odor or wetness.
Nest boxes, however, get poop cleaned out of them every day and fresh shavings once a week.
When we clean out, we pile the shavings and let them rot for at least a year. I'm happier with two years. Then it goes on the garden. So basically, it works like this: Fall, spread shavings from at least a year ago on the garden. Til Clean the chicken coop and put the shavings where the old shavings pile was. Spring, clean the coop and pile the new shavings on the ground beside the pile from Fall. Put the Fall shavings on top of that pile. Rinse, repeat.