I'm guessing that since you have no fan, the lack of air movement is contributing to your problem. 85F for an indoor grow is too hot. I think you might be giving too much fert at 15,15,15. Most grow stores don't sell such hot fert. Opening the door once in a while isn't enough. The biggest mistake indoor growers make is failing to provide adequate ventilation and air movement in the grow space. Remember, plants are genetically designed to live outdoors, under the sun, getting knock around by wind. Airflow is so important. Get a fan, not real big but about 10 inches in diameter. Put it low, preferable an oscillating type, and get low temp air in and high temp air out. Also, let soil dry out and easy on such a high ratio fert.