Hey man, if it's mites you definitely want to take control of the situation. 8 weeks in, are you in mid flowering then or late flower? There might be better stuff than neem that won't leave a residue on your buds, but depends on your local store, what they've got.
I've used flying skull Nuke Em as a preventative but only until early flowering. Its just yeast and citric acid. You want to be careful spraying them with anything if flowering is far along.