I had a similar problem with fruit flies. The best thing you can do is hit it from all angles. Fly strips, neem oil, etc. You can also set the timers on your fans to every few hours when your plants are sleeping, that way the bugs cant get used to any type of consistent environment. I would point the fans to the underside of the leaves. If it's really bad, you can buy a pyrethrum fogger on amazon for 20$. Its a fogger with natural chemicals that wont hurt your plant and will ELIMINATE all bugs for 1-2 months. The only downside is that it might make your buds taste a little different (assuming you harvest within a week of fogging).
