Hey Guys,
Am from the UK so a bit further away but depending on what kind of gunk we r talking about idrk but for like wax in the earbuds (Ik it happens its disgusting) I found that 70% alcohol hand sanitizer on a cotton bud, then rubbing it gently onto the mesh sorts it out immediately its crazy how easy they are to clean. Just be careful with the sanitizer :-) Hope this helps