Until now the snow has been on and off so the hens are still able to go outside some days...In November I completely cleaned out the coop...the coop bedding is already stinky and really dirty . . . damp and soggy. ...it doesn't get this wet this fast in the other seasons
I snipped a lot out of the quote, to show what details jumped out at me.
--Are the chickens tracking in snow/mud, thus making the bedding soggy?
--The chickens might just be pooping INSIDE more, because they spend less time outside (and where they are, there they poop.)
--One option for winter bedding is to just keep piling more on top, then clean out the whole pile in the spring.
--I assume you've already thought of reducing the number of chickens?
--I see you said (in another post) that the waterer is there to stay, and is not spilling or leaking.
--If the birds were chicks earlier in the year, they might be larger now (and thus pooping more), which would also cause it to get dirty faster now.
--You said there are 33 chickens; how many feet each way is the coop they're in?
My best guess is tracked in snow/mud, plus all the birds pooping inside by day as well as by night.
My suggestion is either regular cleaning all winter, or piling new bedding on top regularly so the surface stays dry. (Big cleanout in the spring!)