Incubators need to be fully fumigated after each hatch, all the left over crud from hatching can be deadly to eggs and chicks.I got an incubator for Mother’s Day and hatched a batch. I can’t believe how nasty the incubator was. I put a damp paper towel under the eggs to keep the grate and bottom from getting so bad and it worked pretty good. However the whole clear top/motor was awful from the fuzz of the babies. Had to take the thing apart to clean it. I did love watching them hatch though.