This has been going on for a long time, i thought i'd bring it up, since i haven't seen this posted before. I have switched from listerine mouthwash to biotene mouthwash, it's soothing, it's also for people who've had sores in mouths etc. I still use colgate total though. But even somedays when i do my rountine is still stings, but not near as bad. I will probally switch to biotene toothepaste if there is one too. I just wonder if anyone else has this problem, and if you have gotten an answer for it from a dr or dentist?? My dentist is the one who told me about biotene.