What happens when you turn the humidifier off with the lights? Do you have a timer or daisy chain fiction with the light? If so plug the humidifier into the light. 35% not bad for late flower but 50 would be better for early flower. Their def. In flower so be gentle with defoilation try and cut the bigger fans and any leaves that cover bud sites. You want to make it so you get great airflow through the plant and light penetration. Never take more than 1/3 of the leaves I remove around 1/8 to a 1/4 with autos and if you get to a point where your unsure about taking anymore leaves stop. Defoilation can be a huge benefit done right or a big mistake done wrong. Be gentle you know your plant and what she can take trust your gut. Also I'd lay off the nitrogen a bit she looks a little dark green.