I brush twice a day, floss and use listerine daily. Yeah, I know that's lame. :P My mouth is that healthy light pink color, and my teeth look great. no cavities, no fillings. so WHY might I have this weird sweet/metallic taste in my mouth the last few days? Don't take vitamins, I don't have diabetes, and my hubby and I are STD-free. Any ideas? I'd love for it to go away.