depending on your local humidity levels, you might research 'dry incubation'. i've had way more success doing dry incubation than i ever did following 'directions' LOL
I don't add water to the incubator unless humidity falls below 20%, and then crank it up to 65+ for the last 3 days only. it seems to fluctuate some between 65-75 and has gone as high as 85 without issues, but then i also have a tendency to open it more than some do...
after a few incubations you'll find what works best for you and your situation... some people can't hatch with less than 40% through out incubation, all i did was drown chicks.
not counting shipped eggs, my last 3 hatches now were 10/10, 9/10, and 9/10...
the hatches prior to that were more than 15 years ago and i was lucky to get 30% each time.