My bottles have this funky taste to them, sort of like that "fridge funk" that you get when you don't use baking soda in the fridge. Any way to get rid of that? It's just getting NASTY in there! (The bottle, not the fridge.) DH and I just put them in the dishwasher and I'm wondering if that's the problem. Haven't seen any mold yet, I know my DH has has a bottle that's over 10 years old.