Geez, guys, so I just found a section on this in my incubator instructions. Not sure how I missed it the first few times I looked! Sleepy new chicken mom, I guess 

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Most egg turners have a cover over that hole closest to the motor so you don't put one there.I've hatched a hundred or so in my foam incubator from TSC. I bought the basic turner also. The only problem I have that it is near impossible to fill water reservoir and egg next to motor don't hatch
I have the Octagon 20 and have been advised not to hatch in it for that reason.Hi, we just had an awesome first hatch, but now I'm trying to clean my incubator. We have a Brinsea 40, and the trays, yellow base, and most of the clear plastic top are no problem at all.
But, the inside of the clear plastic "top"- the compartment with all the electrical components, fans, and wiring, is covered in tiny feathers. It's all screwed together and looks like the wiring is attached to both parts (inner cover and outer cover that make up the compartment). Has anybody run into this issue? How do I clean the tiny feathers out and keep them from clogging the fans, sensors, etc since I can't actually get into that part of the incubator without pulling it apart???![]()
Actually, it was really easy once I realized that the electrical stuff isn't actually attached, it just looks like it is. The incubator is awesome so far, and I'm so happy we went ahead and bought the Brinsea 40 instead of the 20. We had an 88% hatch rate our first try, and it was so nice to have the digital readings and the power loss indicator. It was really easy to clean with a brush and blow out the tiny feathers, then just rescrew the cover over the electrical stuff, so I'm thrilled with it!