If the problem was really bad, youll probly have to wash down your walls and clean, clean, clean.
Mighty Wash, the plants completely, then wait 3 days, do it again, then one more time and you should be good. Go to wallyworld, or homedepot, grab a couple Hot Shot, No pest strips. they ill help keep them from coming back. but really the best thing is preventative. Spray new clones, quarantine them for a week. try to be clean when you enter your grow room.