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I'll join in, put 7 eggs in on the 12th. They were shipped eggs (first time hatching shipped eggs) and two were leaking by yesterday! Eck. Opened them and nothing...must have been injured during transport (they better not have been old eggs!!). Hoping the rest are viable...too soon to tell.
With regards to high humidity. Everything you read scares the buhgeezus out of you. I was having 70% without any water in the 'bator as well. What brought it down for me was simply opening a window in the room. We're in Western Washington, having a cold and wet summer plus we have 3 large fish tanks in the house basically...we have HUMIDITY. When I open just one window, it brings it down to anywhere from 56 - 68%. The range changes daily and through out the day. Our last hatch actually came out too dry! Needed to help because the membranes were too dry. Bumped the humidity up to 75% and the hatch finished itself perfectly. Opening the two little vents actually made the humidity worse. 
Oh, it if matters, we have a HovaBator 1588 with a fan.