I would just lift the lid up to bring the humidity down, it drops quite rapidly so a few seconds should be enough, then judge it from there, just remember, the more water you put in, the higher the humidity. I only put a tiny amount in when it drops 😁
I think everyone gets to fixated on humidity, I know I’ve had meltdowns over it, really anxious. My uncle is a farmer (I never ask him things because he would shake his head and think I am thick 🤣) but he’s old school, his eggs were under a broody, they had pipped when she abandoned them, I told...
I have the exact same incubator and for the first 18 days I aim for 45-50% humidity. The last 3, 60-65%, My last hatch was 11 out of 12 eggs, but everyone has their own way of doing things, I don’t stress the last 3 days if it goes up to 70%. Best of luck 🙂