You shouldn't really taste too much metallic taste if its made correctly until your saturated which takes time. Normally when you first use silver you dont taste this metallic taste. After a while of using Silver you do and its a sign your saturating enough silver. Dont stop there though because silver is removed from the body and needs topping up so its not an excuse.
Make sure you DO NOT use Sterling Silver has this has Nickel present which is hard to remove from the body. When Nickel is present then bacteria feed off it and produce ammonia so if your urine smells of ammonia its bacteria feeding off the Nickel this is the reason for Prostate problems in men.