I have been vaping for almost 6 months now, mainly on my G6. Great experience in all I have to say! Yet, after all this time, my the connector on my USB charger is starting to get a little funky and resonated. I try to clean my battery connections to make sure they are clean, but still, over all this time, both are not 100%. I get that resonated taste from my batteries slightly, could really tell when I opened up a brand new battery last week, and I can see some gunk on the threads of the USB connector as well. the G6 threads are easier to clean since they are male oriented, but with the USB chager, since they are female, it is much harder to get something in there and clean them. I do not want to put it in water or other liquid without knowing if it will hinder the inside of the charger. So How, or what is the best way to clean off the gunk on my G6 USB charger?