Hi, my name is Heidi and I am fairly new to the forum. I have tried all three Biotene products that you mentioned, hoping it would help with this horrid metallic taste I have in my mouth. I don't feel as though the taste comes from "dry mouth", but I am still hopeful something for dry mouth will help. The Biotene helps for a while, then the taste comes back, unfortunately. I am always fearful the taste will return with a "vengence", so I hesitate to try anything too often. Maybe that is a weird way to think, but I try to tolerate the horrible taste as long as I can, then try something. In fact, I found Biotene gum also.
In other Forum posts, others have also suggested Tic Tacs and cranberry juice (not together!) Both work for a while, until their own tastes are gone.
Hope this helps others in some way. By reading others posts, I have been helped a lot, even just to know I am not alone in this AN thing! For that I am grateful!!