I have noticed that the fan in my hova-bator 1588 is rattling, at least I think it is the fan. I just finished this latest hatch and cleaned it up really well, disinfected it well and let it air dry. I set it back up and got it going because I have Silver Sebright eggs going in tomorrow. I noticed that the fan is making a noise. I can tell it is running but there seems to be some else, a rattle from somewhere, when I pick up the lid and hold it up it is even more noticeable. I had thought of calling the company I got it from to ask because I have tried tightening the screws on top and still the rattle. I called the company and they are closed til tomorrow, not sure how much help they would be anyways. It doesn't seem like the casing, more like the fan blades or something like that. Any ideas???