I have used this product for years, but not any more. I opened a new container, expires 7/31/2018, rubbed and soaked according to directions, put them in the next morning only to have my eyes feel like they are on fire. I don't know what's wrong with it, but did some reading and has happened before, blaming people for using the Complete Care Peroxide. I did not. It is the one I have bought for years. No mistakes. My eye hurts today...hope it gets better.