also worth bearing in mind that an increased drop of temps, particularly during dark periods, will kill the little bastards, say 60-65C.
An increase in humidity will also deter them, and cause eggs to rot.
Add a few more fans, insects do not like to live or lay eggs in fast moving air.
Personally, would remove plants and spray them with a pyrethrium based product, perhaps mixed with a foliar feed, and bug bomba the grow room and equipment.