So a patron has — for whatever reason, and there can be many — a significant body odor, dental odor, or other hygiene problem. This is not a patron who rode his or her bike to your library and didn't towel off properly. This is a person who we can all smell from several feet away. It could be a combination of body odor, mouth odor, a personal toiletry problem, or unclean clothes (wearing the same unwashed garments day after day). Either way, this a library workplace issue, which can really start to bother the staff who have to serve or work near this person. It demands a "patron coaching" conversation.