Microscopic whisker elves, belayed to the pins on the cap, sit on the edge of the blade and grab whiskers as the blade goes by them. They favor certain blades but can mysteriously appear on just about any DE or SE. When a blade is binned, they unhook their ropes, jump off, and wait for another blade to attract them. They usually wait only a few days but have been known to wait a month or more. Their tastes are hard to discern. They seem to like Dorcos and four day old or older Feathers.