Many people hatch all the time at 50-55% so I really doubt a couple days would harm themLow really works well for me though, it's like my incubator "wanted" to run steady at 40 so I didn't use any water until the end. Avoided fighting between humidity and temp that way. On day 18 I filled my first reservoir with warm water and hit 65 after about 2 hours. I never filled the second one. I'm in Michigan so I think our climates would be similar.
That's great, thank you! I'm feeling much better about everything now!