Dishwashing powder should be added every time. Must use the dishwasher exclusive dishwashing powder or tablet. If you use the normal detergent, it will cause the E4 error.
Rinse Aid
Rinse aid should be added when it is used up. Rinse aid will help to dry the dishes and clean up the little limescale on the dishes.
Dishwasher Salt
Salt should be added when it is used up. Salt will help to soften the water in the dishwasher, which can prevent the limescale. If the local tap water is clean enough, you don’t need to use salt.
Three in One Washing Tablet
Three in one washing tablet includes the functions of softening, washing and rinsing. Usually it is used for mini dishwashers. You need to add it each time you use the dishwasher.