How to judge whether the shoe uppers are unglued from the outsoles is a concern for many people. When there is no checking equipment available, the easiest way is to use your fingers. You can use your fingers to scratch the uppers near the outsoles. If you can easily scratch the uppers away from the outsoles, that means the shoes have some problem. If you cannot scratch the uppers from the outsoles, that means the shoes are fine and you don’t need to worry about them. Therefore, this method is very easy for everyone to do.
