Biosecurity is a practice designed to prevent the spread of disease onto your farm. Biosecurity is the cheapest, most effective means of disease control available. No disease prevention program will work without it.
Disinfectants are chemical agents that can kill pathogens on contact.
Reducing the load of pathogens in the environment of a flock will decrease the r isk of disease. Cleaning prior to disinfection exposes the pathogens to the disinfectant. Remove all bedding, feed, and manure. Sweep out loose dirt, cobwebs, etc. Apply the disinfectant.