I do a deep cleaning about every 4 months or so to my main coop, my mini coop I clean every 1-3 months at least, depending on use... or when it feels gross or I have time. I mix dish soap and vinegar, spray, sit for 1/2 hour then pressure wash. It is completely dry within 1 hour. I also use DE on my branch roosts and poop boards, I do not use DE to rid myself of mites. I grab a handful and throw when birds are not around and it settles thinly just fine. It helps with my daily scraping of boards and composting smells. I also use same treatment on nest boxes and change nesting material once a month. I am in a very warm climate and have a completely open coop and I have fabulous drainage too. The run, I turn in leaves, mulch, grass clippings a few times per year or as needed. My chickens mostly free range. This works for me... my girls rarely have problems with bugs and my eggs are always perfectly clean. Other people in my area do not and they often complain about mites and have dirty eggs. I think that you will find your happy place as you go. What works for some certainly may not work for another.