I bought your Listerine whitening mouthwash yesterday morning. I was so excited to try it! I did exactly what the directions said (rinse full strength for 60 seconds before brushing). Of course it burned, I thought that was normal because of the mint! Well that wasn't the case. My gums wore sore the rest of the day. I simply thought that the product was probably working. So at night, I did my routine again. STILL, a burning sensation! I skipped this morning and did it tonight, I couldn't even last 10 seconds with it in my mouth! TERRIBLE!!!! My gums WERE ON FIRE! I spit it out, rinsed my mouth, looked in the mirror and had white bumps on my bottom gums! My mouth is sore. IM VERY DISAPPOINTED IN THIS PRODUCT. I've only had it for a day and a half. This is definitely not normal. I've never had a mouthwash that gave me those side affects. I WANT my money back. I'm sure this probably worked for others BUT IT DID NOT WORK FOR ME!