You added insulation and windows to fix a humidity problem? That would
only increase it. Are you sure you have a good humidistat, calibrated,
they should be calibrated every few years. Most purchased are way off. I
just bought a taylor, its 15% off. Take a moist rag wrap around
humidistat for 30 min it should read 94 to 96 , recalibrate if it
doesnt.
Did you put foam sheet insulation, does your house have tyvek . do you
have a condensing furnace. Your house isnt breathing enough its to
tight, you should get a blower door test, infiltration, test. You
probably need an air exchanger to move fresh air. Your new windows,
what brand , low e , argon, dual pane do you vent cooking and showers
outdoors, For now open a few windows, air it out see how low humidity
goes, leave a few cracked open see how much of a difference it makes
Find your true humidity, and get some testing done on air exchange.