No, it is not normal to leave soap residue on plates after washing them. Properly rinsing off soap from dishes is an important step to ensure that they are clean and safe for use.
Leaving soap residue on plates can result in an unpleasant taste and odor on your food. It can also cause skin irritation or allergic reactions in some individuals if they come into contact with the soap residue.
To ensure that plates are thoroughly clean, it's important to rinse them with clean water after washing them with soap. This rinsing step removes any remaining soap residue, along with food particles and bacteria that may be present on the dishes.
Take care to rinse each plate under running water or immerse them in a basin of clean water, ensuring that all surfaces are thoroughly rinsed. Once rinsed, allow the plates to air dry or use a clean towel to dry them.
By properly rinsing off soap residue, you can ensure that your dishes are clean, safe, and ready for use.