I have a cure!! or atleast help! i had the same problem and i figured away out to stop the buggers! go to the fish store and buy white gravel, the smallest,flastest,cheapest white gravel they have(white helps reflect light!) and put about an inch of it on ur soil. make sure there is no soil showing watsoever. then press the gravel down to make it compact, but not to much to were u make the soil compact. and now those fucking bugs cant get through the gravel !
it works for me, also i sprayed alot of raid in my grow room and it killed 90percent of them, didnt affect my plants though