Silica is by no means a cure all, but a safety net yes. It has made the difference for me as I have to use less supplemental support during late flower because my girls can support their own weight better. I HIGHLY suggest getting some and using it every watering if you have not.
Curious to see how the rosemary and cinnamon works. I always prefer a natural cure to a store bought. Peppers and garlic make a potent mix that bugs hate, just have to be careful of the concentration because it will burn.
I alternate Monterey garden insect spray and Azatrol. I have seen great results with the monterey and it's a HELL of a lot cheaper than the azatrol. Check it out if you haven't.
It's available at most garden supply shops. It's organic and food grade. The active ingredient is spinosad, which I...
Had the same problem. Got rid of all the ones that looked this way but one, which I threw outside just for shits and giggles. I would quarantine if not destroy.