If you don't have pipe cleaners handy and you're going to the store to track some down anyway, go to the dental care aisle at a drugstore and pick up some of the tiny brushes that are designed to clean between your teeth. They're built like a pipe cleaner but they're short and tapered from about a quarter inch wide down to a point, making them useful for a range of small cleaning jobs, and they won't leave fibers behind. They fit onto a plastic handle and the refills are cheap.
