As far as the humidity issue goes.. I quit using the water reservoir in the incubator because I had a very hard time getting the humidity were I need it, usually too high, and it was hard to keep filled with the egg turner and eggs in it. I now use milk or juice caps for water reservoirs. They work a lot better, at least in mine. I live in Southwest Idaho, and I am originally from Iowa, but have lived in Colorado and Arizona. So totally understand the Humidity issue. I would try it w/o any water and see, you might get away with out using water for the 1st 18 days.. Again a trail and error thing.
It sounds like you have a temp gauge issue. I don’t know anything about the Farm Innovator, but the 3 hobbyists that live in the area, told me (when I first got into incubating w/ a used Little Giant 9200), that some of the brands have temp gauge issues and/or issues holding humidity. They also said that the best incubators were the Little Giant and even better, the Hova-bator. The only issue I have had w/mine is the temp gauge got tweaked a couple of years ago, and I didnt realize that the temp knob was missing when I got it.. So I was having trouble getting the temp right again. The guys at Incubator Warehouse. com help me out..
And YES!! Having an Egg Turner and a Fan is a big help. The Fan will keep the temp even through out your incubator. The egg turner means you wont have to remember to turn your eggs 2-4 times a day. I will not
buy an incubator w/o the fan… or an Egg Turner now, and I’m glad that my used one already came with that stuff when I bought it. I didnt have to learn the hard way.
Just remember one thing..When it comes to incubating, no two work the same, even if you are neighbors.. You have to find what works for your incubator. So logging down everything is a good why to remember what worked and what didnt with each hatch, until you know you incubator.