... hardware,jewelrys,watch,necklace,ear ring,ring,bracelet,coin,glasses,sun glasses,nozzle of the printer,artificial teeth,comb,toothbrush etc ... only water,without other special chemical;3.You can see the perfect cleaning effect with your eyes;4.Automatic ... small hardware,jewelrys,watch,necklace,ear ring,ring,bracelet,coin,glasses,sun glasses,nozzle of the printer,artificial teeth,comb,toothbrush etc. ...