I decided to fill this vent in the pantry cupboard.2021-10-12_05-00-17 by The Pingus, on FlickrI got a little carried away2021-10-12_05-00-35 by The Pingus, on FlickrA couple of hours later it had expanded even more and turned into a demon2021-10-12_05-01-04 by The Pingus, on Flickr