If you know how the spots are formed, you must improve them. There are too many simple methods, so it is not recommended to use them. Moreover, using them will not change much. It is more direct and effective to use things like Shi Baolai to deeply decompose and dilute the yellow rice spots on the surface, accelerate metabolism, and add a better life and healthy diet. No matter how long it takes, plants will go. Plants are very gentle.