The reason I worded my advice the way I worded it is because I have never had a problem from slightly too high humidity. Granted I've never tried ridiculously high but there will be a million people offering their advice and only a handful will have the experience to have some valuable info...
actually the ideal tranpiration is 13% by day 21. So more like 11-12% by day 18.
7.1% sounds like 1.1% too much. That might not sounds like a lot but that is over 10% too much humidity loss so far imo.
I would make some adjustments. I have found the sweet spot in my incubator is 48%, lets...