all looked good so suck on an entrance reducer and left them alone.
Maybe if you stop sucking on the entrance reducer your moisture and mold problem will go away.
Just kidding of course, but it does sound like your hive may be collecting water on the bottom board or slatted rack if you are using one.
I use the Better Bee slatted racks and have found that water will puddle in the front if the hive is tilted forward. I drilled small holes to allow for drainage, but the bees filled the holes with propolis. This year I increased the hole size to 3/8" so, hopefully, the bees will not fill them.
I could see mold growing everywhere the water was puddling and even some mold on the bottom corners of the frames.