humidity is going to jump way up in a small incubator with hatching chicks it does that to me every time as well, this time I tried to keep my lockdown humidity lower by not adding as much water and it did help a little, but my windows are still full of condensation and I cannot see in well. That happens because the hatching chicks and the insides of the shells are wet and it adds all that water to the air. I do not nor would I take the top off to wipe down the water, you could lose too much humidity and end up losing some of the remaining chicks to sticky chick. I have not had any ill effect from the higher humidity during lockdown.
I am not worried about taking the top for a few mins. That humidity is too high can makes it hard for them to breath. She still has water in the bator and more chicks to hatch. She is only half way through. 5-6 chicks out and I think I gave her more than 12 eggs. So it will go back up quick when they start hatching.