What is this solution you are using frankster?:) for the sake of education
well it's main ingredient is soybean oil, but it's the molecular structure of the soybean oil, what I've done to it, and a few additives, I don't want to go too in depth. ever heard of a colloidal micelles?
that's the basic chemical structure. it helps protect the surface of the leaf, and it makes water surface tensions work a little better, helps kinda lubricate molecules moving around, and promotes a moist well buffered environment. fluid dynamics, also (maintains proper pH) it does several things at once actually, and it's a basic "carrier" for delivering targeted nutrients, or treatments for pest.
for outdoor plants, it not only prevents pest, but also protects against extremes of heat, (drought) and extreme cold, (freezing temps), or wet rain. (builds repellency), molds "slip" off it, hydrophilic, antifreeze qualities. it's pretty amazing, and it's entirely organic plant based.
It joins a water & oil molecule, making them miscible, and evenly distributed in solution, it creates a stable structure. I dissolve the eggs with a bit of citric acid/ascorbic acid, (and some other things) and they die by suffocating in the adult stage. it's quite brilliant strategy, because it enhances overall plant health while killing the bugs.
I've effectively killed both spidermites and fungus knats, I even made the fungus knats (in my worm bin) just to kill them again, actually.