Do you have a sponge that you could use instead of the water reservoir or possibly some of those decorative glass rocks that you could put in the reservoir to reduce the surface area of the water? You may need to get creative but in this case, because your humidity has been quite high throughout incubation a little low is better than too high.
I'm sorry if you've already answered this question but I get people mixed up sometimes, what incubator are you using? Maybe we can find some tips and tricks that others have used for the same model?