get one of these and place by your fan to circulate the air through your plants

also use neem oil @ 7ml per/quart and spray them about every 4th day
it is good idea to put some dish soap(2ml) or i use Dutch master Penetrator in my foliars and only use it @ 1/3 strength

do both and change the NPS every 4 month and your spidermites will not be back:thumbsup: