I was going to mention that if there's a situation in which there's a possibility of a problematic temp gradient in the incubator, then a fan should...
Chris Hardwick posted a couple videos where he discusses setting up a very similar incubator, and he advises you to put the probe on the heat tape. ...
That's a common place (the chin & neck area) for sheds to get stuck & need our help with; personally I get involved & make sure it comes off as soon...