I've never seen an answer to that, but I know those really thin but durable cleaning rags you can use on screens and glasses are great grabbers of junk. I find you can wrap one of those around a thin card, wet it with 91% isopropyl alcohol and it'll clean it as nice as the original kit from Nintendo. I still have the kit for for nes/snes with spares, none for 64 but I'd go that route for myself if I needed to.