ok so i bought this thing brand new. it was my first authentic mod that i bought brand new (all others used). its is beautiful. my only problem is, is that it was dirty as hell. all the threads and the switch was dirty. paying this much for a mod you would think it would come pretty clean. i usually clean my mods with just a micro fiber cloth which works well, this one i am having a hard time cleaning. any certain stuff i can use to help that wont mess it up?