I use wood shavings with the deep litter method over a dirt floor. Being in Costa Rica I worried about the 100 inches of rain we get a year so when the coop was built I had footings down 2 feet with 3 rows of blocks on top of the footings. I have only completely cleaned up the litter once. What I do is to replace a small area of litter, two 5 gallon bucket fulls of old litter with enough shavings to make it 8 inches deep. In the mornings and in the late afternoon I scatter cracked corn on the litter which the chickens go for in a big way then as the corn disappears they scratch turning over a lot of shavings. The flock spends most of the day in the backyard, each hen will make her trip to the nest boxes as needed. There are many times I'll go into the coop to find one or more chickens all but buried in the litter. No idea why but I have checked the hens for bugs/mites and found none, perhaps it is as I have read that the good bacteria and such that live in the good deep litter do keep them bugs and mites free. The chickens will be out in all but the hard rains during the day, the rain knocks down flying bugs then the chickens clean em up. They will be wet when they return to the coop to roost but nice a dry in the morning. I have had no sick chickens in the two plus years that I have had the chickens. Whether that is because of the microorganisms in the deep litter I don't know but I sure am not going to do any different, your mileage may be different.