The book doesn't tell you how to deal with humidity spikes. Mine is up at 80% and I have only one channel filled. The alarm keeps sounding and I get ee on my humidity display. Nothing in the manual about that. It's a brand new unit.Did you figure it out? If it's the clear top once with yellow turners I have the book and can tell you how. I am guessing not though, as the book that came with mine is excellent.