First step is like yousay, opening the tent. its very common that in later stage the humidity rises because there ae many leaves who transpirate.Nex tthing i would go is rising temp.. that lowers automatically, but you are still in hgh temps. Adding fans / installing exhaust/ helps too. Get rid of the carbon filter in your exhaust helps too. And letting the tent open for more airflow. And if everything dont helps you got to buy an dehumifidier. Ive tried catlitter too , but i could not see any effect. waering less / smaller amounts helps too. so this wold be my solutions, hope one fits for you