Most def spidermites - HOT SHOT PEST CONTROL STRIPS.

Not the ones in the orange packaging, get the ones in the blue packaging, much more effective. I have TWO in my tiny closet and NOTHING but plants are alive. Any bug that does get in there is dead within 24 hours (flies, moths, aphids, etc.)

Home Depot, Lowes, most any hardware store has them. I think you can also find the Dr. Doom strips, same stuff, at hydro shops - just ask for dichlorvos strips.