OK, well, you need to have someone find the nest, and get rid of it; and you will have to make sure there are no other places other than the vent where they can get in, and close those up.
I am here as well; I have merely been keeping a low profile. Wishing you well with your diagnosis @Charlet. Knowing for certain what it is that ails you is the first step toward effective management of it.
So... if you were drafting a cast (let's say voice, as if animated, and then, as if live action (preferred)... so do it as "cast/cast") for a potential Carmen movie (big movie... think Fellowship Of The Rings-level big... (assuming someone had a big enough story/script, and could find all the other people)... who would you want?
I'm working on continuing it, but input would be good. Maybe if it could be finished, maybe it could be printed as a book, or maybe sold as a movie (only for a big amount, and the original author get's a big cut)... if anyone, after reading through that folder (it's a live folder, so updates on my end go live when I save. If you have something to add, stash it someplace and let me know... I'll try to work it in as the story stands.))