I layer shavings as needed and only clean the coop out ..completely twice a year. We will shovel it out under the roosts if it gets bad in there but generally it is fine. I have had chickens in there for almost 5 years now and will dust with DE before putting down fresh shavings or whenever I think it is needed but other than dusting the cobwebs out, I do not bleach it at all. They are fine. But do what you feel comfortable doing as far as bleaching,etc. but they really will be fine.