Personally I'd avoid metal tools for cleaning it out as if you're not careful you can damage the socket. I just cut a thin slither off a bamboo skewer and use

Personally I'd avoid metal tools for cleaning it out as if you're not careful you can damage the socket. I just cut a thin slither off a bamboo skewer and use that - you can get a pack of 100 skewers for next to nothing at the supermarket and that'll last you forever - unless you actually make kebabs with them :D