Hi
With roots so established I would definitely raise your pod out of water range (stop dampening off)
I notice your humidifier close but OK I would pull it away a little though
Not sure on using the AC Infinity fan there is really needed either
I use 2 ACs Inside my grobo to improve circulation & also strengthen the plant
Hope your adding 5-7ml of Hydroguard with every water change & After grobos Dosing btw I leave mine till the nxt day
I think if you remove the fan & move the Humidifier away slightly but Still pointing towards grobie you should start to see your R.H drop
Never reached above 48RH with Humidifier set @ 40
Good luck bro