I'm on my 3rd and this is the first I've encountered bugs spider mites to be exact. I used some sprays but, the best thing to get rid of them is CO2. I put a 10# bottle in my tent and turn it on every couple days and fill my tent and turn off my ventilation for an hour or so and it smothers the bastards. But be careful cuz CO2 can KILL you and everything in your house that breathes oxygen so I only fill the tent for about 15 minutes until I can get a more advanced delivery system, it works awesome if you can afford it