Dom,
Glad to hear u got the digital hygrometer! You wont regret it,
Now im no incubating expert, but seeing that the lower ones seem in great shape, i would think that they are receiving more humidity then the ones above.
i agree with the post above, use a damp paper towel on only the ones on top and keep it there for a few days before u start trying ur next option.
If u are really paranoid , you probably arn't giving the damp paper towel a long enough chance to do its job.
As Kuroski put it....RELAX....!!!
Good things come to good ppl.

And im no carpet expert, but shouldn't eggs be kept around 95% humidity???
Gvg