What if the soap is too dry after many years?

In fact, soap has a shelf life. Even if soap is not opened and used, some of its components are still volatile and oxidized. Those active ingredients that can remove dirt are not very effective. If it is dry, some water, glycerin and so on in it will evaporate. It is suggested that soapy water that has been used for many years can be used for ordinary mopping, and washing clothes may be useless.