I usually hatch my flock's eggs with good results. I decided to buy some from someone and have shipped to me to try something different and it has been a heartbreaking experience. I received 12 eggs that looked pretty good visually. I left 7 in the incubator at lock down. Five hatched, but they appeared weaker that what I had normally experienced. Within 7 days they have all died. They would get where they sleep all the the time, wouldn't eat, have droopy wings, and pant all the time. The environment was fine, so I know it wasn't that. I'm thinking it was some sort of bacterial infection that was in the egg. I have since was everything with a bleach mixture, but I am concerned about my Brisnea Octagon 20 Advance. I am not sure how to thoroughly clean the top part where the fan and electronics are. I want to make sure I get rid of any trace of bacteria or virus or whatever. Thanks.