I have always been a customer of Pepsodent Germi Check. I started using Pepsodent Germi Check about 3 weeks ago and now have extreme sensitivity to cold products and even air. I have to take pain medication every day now. I went to the dentist and they have no idea why, being that my x Rays were all normal. This is horrible and has affected my life. I can no longer eat ice cream, salads, drinks with ice, etc. Do not use this product!