All those little boogers need to do is to touch the VCO and that part of their body will start melting away. If you spray again work from the far outside in a circular motion around the vent so the majority left have no escape.
Hope this helps
You did a great job. It's a terrible horrible icky thing to have to tackle, but you did
Oh, thank you sooo much for your response! That is such a good idea! I do plan to spray with VCO again. After I ran out of oil, I noticed some chicken beards that looked suspicious. How soon again should I spray them? I'm wondering how many times I'll need to do it.