Before the hatching eggs can enter the hatchers, the hatchers should of course be well cleaned and disinfected. To support the hygienic circumstances during this period in which the chicks are finally going to hatch, the common practise today is to evaporate formalin in the hatcher. Hence this is a labour intensive activity and the goal is to ban formaldehyde completely from the hatchery, CID Lines has developed a fully automated protocol for hatcher disinfection.