Chicken Coop Disinfectant Recipe - orange peels steeped in vinegar for a month, then put in a spray bottle. Making my own would be much less expensive. It is sprayed inside the coop when I clean it to discourage mites, fleas, bugs, etc.
Using wood ashes for your chickens saves you money. store them (fireplace ash only, not BBQ coals, etc) and when needed, mix 2 parts ash to 1 part sand for the chickens to do their dust bathing. And guess what? It keeps mites away.
Home Farm Ideas: Chicken Dust Bath - WHAT TO FILL IT WITH? soil from your garden. sand to make it a bit more dusty. Wood ash is very harmful to parasites. Just burn some leaves and let the ash cool before adding it:).