your right about that, its the glass condensation, and rainx did not work, made it smaller droplets of water and more foggy then puddles of suspended drips. i've been looking up anti-condensation sprays, gels, foams and what not. i found an article ( cant seem to find it again) about a product that actually absorbs the water and spreads it out like sheet so it still clear and lets light through undisturbed. like a wetting agent but different stuff to make it i guess. its not like they advertise this sort of stuff for grow ops ether.
i tried the a small fan and it worked a little, running out of room to set up more fans in their. but it might come to that. i was also thinking about getting a thermostat fan controller but i don't want my room to heat up any more or how i would rig to just control the air going through my lights. in the end i'm just a 20% to 30% decrease in light but who wants that. if its not one thing it anthore!