You don't 'mist the shit out of your plants' when you are using a new fertilizer or pesticide for the first time !
Neem when overapplied can SUFFOCATE your plants. Mist LIGHTLY, and not the undersides of the leaves. Allow to dry. Wait a couple days. Mist again. You want to make certain that your strains and conditions and the pesticide are not incompatible in any way. Some strains are more sensitive, and high temps make that even worse.