I assumed the reason for the high humidity was because of the fogger.
I also assumed that since you are using a fogger, maybe the humidity was too low in the past, so I suggested using plastic wrap without the fogger. That's why I suggested doing that.

This makes things simple then: ditch the fogger, don't use plastic wrap.

If the humidity gets too low, cover some of the ventilation with the wrap. Keep doing it until its high enough to your likening, or remove some if it gets too high. It takes some tweaking to reach the sweet spot.

If it is still too high and the top is completely ventilated, just let it dry out a bit on its own. The frog will be fine for a while with high humidity.

Also, above all, make sure the instrument you are using to measure the humidity is reliable.