Get a fan blowing over the plants and top of growing medium
Azamax
Essentria IC3 Insecticide
Insecticidal soaps
Doktor Doom Spider Mite Knockout Spray
Floramite
Bleach solution (1 tablespoon of bleach to 1 gallon of 95°F, pH balanced, water in a spray bottle or mister)
Alcohol and Water mixed together (9 parts water to 1 part alcohol)
SM-90 mixed with water (1 part SM-90 to 5 parts water)
Neem Oil
Insect predators (ladybugs and predatory mites)
Diatomaceous Earth
Treat Entire Grow Area With Insecticide, Not Just Plants.

NOTE: Avoid using nervous system insecticides, such as malathion, Dursban (chlorpyrifos), and Orthene (acephate). They are labeled for use on many shade trees and ornamental plants for aphid control, but are not safe to use on cannabis. If something isn’t safe to be used on edible plants, then chances are it’s not safe to use on cannabis.