The only time i'd aim for 80% humidity is in my clones box to promote root growth.a friend told me I needed to be running around 60 to 80%
During veg i aim for anything between 40 - 60% humidity. Once you go above 60% humidity your plants are much more prone to mildew or mold.
During bloom i try and keep it between 35 - 50% humidity, i really make sure i don't get up to 60% during bloom otherwise your flowers will become prone to mold.
Your plants are in bloom, so try and keep your humidity low. You are going to have issues if you go to what your friend said and push your grow up to 60-80 humidity. That's a big no for me