Ok, dreaded pm got to me too.
I noticed a smudge aproximately 2mmx8mm on dinachem. Plucked the leave and did a defoliation to increase airflow and also to get the other ones i might have missed.
Checked the other plants and they seem fine, no white patches, but i noticed couple of dew drops on NL and Dinachem, sticky and clear drops. What could that be, have you experienced something like this? They were on the upside of the leaves and lights were on.
Also i am thinking of applying milk spray, sodium bicarbonate spray or apple cider vinegar spray to eradicate powdery mildew, my plants are forming flowers now, do you think any of these sprays would have an adverse effect?