I was wondering if any of you have tried using DE, Boric Acid or Hydrated Lime in the trays?
I have though about DE or salt. The larvae are hard to kill. I have watched them crawl in and out of the oil for hours. Somehow they can stay under the oil and crawl from one side of the pan to the other and come up the side, and I did not even see a snorkel at all :).