I bought a LG and sat down & read every single word on the enclosed instructions. in fact read them more than once. Set it up until temp reached 99 and added eggs,since then the only time it is opened is when I add water. they are due to hatch on 6/26. if they hatch i will be very happy, If not, I will try again.I am not an expert on bators, I would much rather the hens did the job but since they won't I'll try. nothing tried, nothing gained. marrie