FWIW, when Q-Tips are too big, I find that G.U.M. "Soft-Picks" work very well. You can find them in the dental section at the drugstore/superstore. I started using them after my dentist recommended them, in addition to floss (the older you get, the more you need this stuff). Found that they work really well, decided to try them on my guns - same great results. There are cheaper versions at the dollar stores that might be OK for guns, but the sample my wife brought home was terrible re my teeth. The great thing about the GUM ones is that there is no shedding of anything and they have tiny little "branches" that collect debris. I call them "pine trees" when talking to my dentist about them. Highly recommended for tiny-crevice work.