Re: Metallic Chemical like taste.
Soak in warm water, baking soda and some vinegar for a few minutes and blow out. You can use something that has Low Pressure air, like an Air Duster. Or you can buy a broad (thick in brush diameter) pipe cleaner and attach it to a powered drill and spin it out, works by hand also.
I don't recommend using any type of alcohol because of the high pH.