Oh yeah... If a pollen sack opens, your grow space is contaminated. Clean hella good with bleach water or another good sterelizing method between grows....
Wind will suck out moisture, maybe its drinking to much because the heat combined with strong fan. That will cause extreme dry conditions... The oily look can occur when the sweet glands on the leaves dries up due to wind or extreme heat. Same with our skin and sweet glands. Just a thought... to...
Hows your ventelation? I have seen this before in a plant thats been blasted with wind. It honestly looks like wind burn.... thats why the older plant looks oily (wind burn)... but if your ventelation and fan situation is fine, you've got me man...!
The later in flower a plant is, the bottom leaves start to yellow and fall off because the plant is soaking up all its nutes and energy through unwanted leaves... totally normal. Your plant is focusing on producing buds this late in flower, so all the nutes go to producing buds and not older...
You should be fine leaving them on, especially if you have tested it before. Something wrong would have already happened... :) I leave lights on all the time, so does everyone else, so it should be all right!...
happy growing bongsmilie
I would say no... trichs look milky, cliudy and clear. Wait until week 8 or so if no microscope. I would push to 9 weeks if it was me... nice buds man! :) hope it helps...