Need help! Greenhouse problem: mold, plant burn & disease

This year I have to grow my plants in a greenhouse because of the new ordinance. So I constructed a greenhouse about 5 feet tall with both ends almost covered with insect screens (similar to the window insect screen). Seems like the greenhouse was too moist so mold started growing on some of the stems, branches, and leaves. So I brushed the infected parts of the plants with a toothbrush and hydro peroxide and used a 3 fans for airflow blowing at one direction toward one end of the greenhouse and that seems to help with controlling the mold but another problem occurred. Because of the fans some of plants' leaves started curling and burning. But without the fan the temperature inside the greenhouse would also be too high because I live in a climate with 85-100 degree. Please anyone help this newbie out this is only my second grow but 1st to greenhouse growing and I don't know what to do. Thank you in advance.

Hi refugee, some thoughts can you vent top of greenhouse,, heat rises, and some vents for exausting air out while using fans
why do u believe fans caused leaf curling / burning, how often do you water, how old are plants

Thanks outdoor farmer. So you're saying if I vent the top of the greenhouse that would help? And the reason I believe fans caused leaf burn and curl was because the plants weren't like that before I started using the fans. The plants just started to flower at the moment. thanks.

Pictures help

Have you tried some greenhouse auto vents?

Ringsixty sorry I don't have a camera so I can't take pictures. I haven't tried auto vents but both ends of my green house are almost widely open. The only thing that doesn't make it widely open is that I cover both ends with insect screens and those screens have big holes so air penetration is easy. The greenhouse is 20 ft long, I wonder if I could make a vent in the middle of the greenhouse.