Oh dear, I don't know where we get the idea we have to clorox our chicken coops. We're so used to thinking of manure as icky and awful, but were were never shown how to use it responsibly and cleanly. I highly recommend deep litter, and I wouldn't even change it yearly. You only need to remove used bedding if your coop gets too full! Then only remove part, and add more fresh wood shavings, rice hulls or dried leaves, whatever you use (or a mixture). You chickens will be healthier because of the good microbes, which actually make important nutrients such as Vitamins B12 and K, which chickens take in when they scratch through the litter. Rake in new poops and fluff up the little daily, add fresh bedding as needed for absorption. If you smell it, you need more fresh better, more fresh air, or more stirring the litter, or all three. If your coop floor is not dirt, throw in a few handfuls of dirt (or active compost, if you have it), to get some good microbes in the mix. Best wishes!