Like everyone is saying, 5 is nothing. I checked my oil trays this evening. Some hives had none, some had few, one had about 300. I am not using oil this year. I use a 4" wide plastic scraper and kill them by flattening them by dragging it over them. I also killed a lot of carpenter ants and their eggs. They like the screen top boards. The 4" scraper also works best to take them out.