Hi all: One of my biggest pet peeves working in a museum has been to deal with pest management. I've done a fair amount of research over the years and there just isn't a lot of detailed information out there. I've been racking my brain recently about non-chemical options and thought about those electronic/ultrasonic plug-in pest repeller units (the ones you plug into an electrical outlet). Has anyone used these? Should they NOT be used in a museum and if not, why not? It seems to me that if they have no negative repercussions in a museum environment, why haven't we heard more about them? Any conservators out there who can tell us if these can be used or not? Thanks. Cathy Westfeldt, CRM Collection Curator Hallie Ford Museum of Art, Willamette University (503)370-6867 [log in to unmask]