I've had one of those plug cleaner for going on 20+ years. they work real good but you do have to have a large sewing needle to get the few grains of grit out.
X2... If you've ever looked down into a plug around the insulator after you cleaned one you'll see some grit is left no matter how much you blow it out or wash it out with cleaner. Only way I've ever got it out is like Bob said with a large sewing needle
