maybe its just me being new and stupid again. But i think the dosage for CalMag is assuming that you arent using RO water. Maybe try doubling the dose of CalMag. IMO it is a good idea to spray before the lights go out. Those tiny drops of water will act like little magnifying glasses on your leaves if the light is on. I noticed seeing leaves in your one picture that looked like where a leaf had been crossed over one another that the problem didnt seem so bad on the under foliage.