I've only incubated in late winter/early spring, when we are still using wood heat and the house is very dry. It might depend on your incubator too. I have a Brinsea Octagon. I use very low humidity (20 - 30 %). Then at lock-down I bump it up to 70%. The only way I can keep the humidity that high in our dry house is to line the bottom of the incubator with a washcloth or thick paper towels to increase the surface area of the moisture. Then every morning I use a thin straw (put through the ventilation hole) and syringe to add a bunch of sterile warm water to the washcloth and bring the humidity back up.
That has worked well for me, but I think you will get a wide variety of opinions on this!
That has worked well for me, but I think you will get a wide variety of opinions on this!