Hoo boy.... ok. Stop. Just stop. Nip, the leaves are all gnarly because they were treated with alcohol. It's like taking Round Up herbicide to your garden. That's what poison does to plants. Toshin, if you get mold regularly the problem is usually airflow, not RH. Even 70% RH is no big deal if you have mass amounts of airflow keeping everything fresh, while a relatively low 40% RH can be the kiss of death in a garden if it has limited airflow. Sealing your garden tighter without increasing airflow will only exacerbate a mold problem. That said, ideally a cannabis garden should be at 50% or less RH during late flower. Prior to flowering anything under 75% RH is acceptable.....as long as you have adequate airflow. In my climate I run my gardens at 60-80%RH and 80F during July and August as a cost saving measure. I can do this because of lots of airflow. It's key to everything. Not suggesting you try this...but using it as an example of how the balance works. It's easy to push the boundaries once you understand how they interrelate to one another and what the plant needs in any given conditions, but you gotta settle down and do the basics first. Temp (which apparently is quite good), lighting (weak), airflow (weak?). Fix those before anything else. You'll see the improvements immediately. Being a dirt farmer I got no solution for your drifting PH. That's one for those techno advanced smart guy hydro-heads.