I am using a modified deep litter method. my coop (a former garden shed) has a dirt floor, covered with chicken wire. I put down a layer of plastic (to make it easier to pull the used litter out), then a deep layer of pine shavings. Every day I go in and toss handfuls of fresh pine shavings over the poopy spots. I also sprinkle food grade DE on the perches, nests and floor about once a month. I spray the walls, perches and nests weekly with Poultry Protector. (enzyme based product). Every six weeks or so (less often in winter) I pull out all the shavings and dump them far from the house in the orchard - not the compost heap, wood shavings are not good for that. Put down more DE, and start over. I have not had any insect problems. The coop does not smell - often I'm surprised how pleasant it is in there, esp. when I have fresh hay for the nests.
I've only had one hen die of illness and I think she might have eaten something poisonous. The chickens freerange most days: this helps keep the house and yard cleaner, and keeps them healthier.