I guess I've always done DLM a little differently than some of you. I only start with enough litter to cover the floor with a reasonable amount. Like a couple of inches. Enough so that you aren't seeing the floor underneath. I don't stir at all. It's the chickens job to mess around in the shavings, not mine.
As time goes on, instead of adding larger amounts of shavings on top all at once, I add smaller amounts of shavings, more frequently. I like to keep an extra feed scoop in the top of a bale of shavings. That way, I can just sprinkle a couple of scoops of clean litter under the roosts or anywhere else that needs it. That would be for a garden shed sized coop. How often depends on how many chickens are in the coop and how much time they're spending in there, due to the weather or lighting. I might do this every couple of days.
I'm not stirring clean litter up from deep on the bottom, to mix with the droppings on top. I'm making lots of thin layers of droppings covered and mixed with clean litter, that add up. The end result is about the same, but how it's created is different. I think this results in a cleaner top layer, more consistently. I hope this made sense!

As time goes on, instead of adding larger amounts of shavings on top all at once, I add smaller amounts of shavings, more frequently. I like to keep an extra feed scoop in the top of a bale of shavings. That way, I can just sprinkle a couple of scoops of clean litter under the roosts or anywhere else that needs it. That would be for a garden shed sized coop. How often depends on how many chickens are in the coop and how much time they're spending in there, due to the weather or lighting. I might do this every couple of days.
I'm not stirring clean litter up from deep on the bottom, to mix with the droppings on top. I'm making lots of thin layers of droppings covered and mixed with clean litter, that add up. The end result is about the same, but how it's created is different. I think this results in a cleaner top layer, more consistently. I hope this made sense!