Thanks so much for the advice. All good now thank god! And all dried out.If they're all out you could safely let out all of that humidity. It's only needed for ones that are still pipped or soon to pip. You probably could move them and dry it quickly but I don't think you really need to and I'd say they're better off staying in there. You should remove any water source and drop the humidity setting right down if you have one. You could also try tilting open the lid a crack for a few seconds at a time until the steam is gone.
It does take a good couple of hours for them to dry so I wouldn't worry too much about that and I think I remember my cardboard was quite wet as well so it's probably normal. I think I even had chicks drinking some water that was pooling at the edge! If the whole incubator is full of steam I would do something about it just to help them dry quicker and to make sure they have fresh air.
I'm surprised there's no vent on the incubator. I have a larger version of that type of Brinsea and there's a little round piece to turn on the side.